Hope: A research-based explainer

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This year, more than 60 countries, representing more than 4 billion people, will hold major elections. News headlines already are reporting that voters are hanging on to hope. When things get tough or don’t go our way, we’re told to hang on to hope. HOPE was the only word printed on President Barack Obama’s iconic campaign poster in 2008.

Research on hope has flourished only in recent decades. There’s now a growing recognition that hope has a role in physical, social, and mental health outcomes, including promoting resilience. As we embark on a challenging year of news, it’s important for journalists to learn about hope.

So what is hope? And what does the research say about it?

Merriam-Webster defines hope as a “desire accompanied by expectation of or belief in fulfillment.” This definition highlights the two basic dimensions of hope: a desire and a belief in the possibility of attaining that desire.

Hope is not Pollyannaish optimism, writes psychologist Everett Worthington in a 2020 article for The Conversation. “Instead, hope is a motivation to persevere toward a goal or end state, even if we’re skeptical that a positive outcome is likely.”

There are several scientific theories about hope.

One of the first, and most well-known, theories on hope was introduced in 1991 by American psychologist Charles R. Snyder.

In a paper published in the Journal of Personality and Social Psychology, Snyder defined hope as a cognitive trait centered on the pursuit of goals and built on two components: a sense of agency in achieving a goal, and a perceived ability to create pathways to achieve that goal. He defined hope as something individualistic.

Snyder also introduced the Hope Scale, which continues to be used today, as a way to measure hope. He suggested that some people have higher levels of hope than others and there seem to be benefits to being more hopeful.

“For example, we would expect that higher as compared with lower hope people are more likely to have a healthy lifestyle, to avoid life crises, and to cope better with stressors when they are encountered,” they write.

Others have suggested broader definitions.

In 1992, Kaye Herth, a professor of nursing and a scholar on hope, defined hope as “a multidimensional dynamic life force characterized by a confident yet uncertain expectation of achieving good, which to the hoping person, is realistically possible and personally significant.” Herth also developed the Herth Hope Index, which is used in various settings, including clinical practice and research.

More recently, others have offered an even broader definition of hope.

Anthony Scioli, a clinical psychologist and author of several books on hope, defines hope “as an emotion with spiritual dimensions,” in a 2023 review published in Current Opinion in Psychology. “Hope is best viewed as an ameliorating emotion, designed to fill the liminal space between need and reality.”

Hope is also nuanced.

“Our hopes may be active or passive, patient or critical, private or collective, grounded in the evidence or resolute in spite of it, socially conservative or socially transformative,” writes Darren Webb in a 2007 study published in History of the Human Sciences. “We all hope, but we experience this most human of all mental feelings in a variety of modes.”

To be sure, a few studies have shown that hope can have negative outcomes in certain populations and situations. For example, one study highlighted in the research roundup below finds that Black college students who had higher levels of hope experienced more stress due to racial discrimination compared with Black students who had lower levels of hope.

Today, hope is one of the most well-studied constructs within the field of positive psychology, according to the journal Current Opinion in Psychology, which dedicated its August 2023 issue to the subject. (Positive psychology is a branch of psychology focused on characters and behaviors that allow people to flourish.)

We’ve gathered several studies below to help you think more deeply about hope and recognize its role in your everyday lives.

Research roundup

The Role of Hope in Subsequent Health and Well-Being For Older Adults: An Outcome-Wide Longitudinal Approach
Katelyn N.G. Long, et al. Global Epidemiology, November 2020.

The study: To explore the potential public health implications of hope, researchers examine the relationship between hope and physical, behavioral and psychosocial outcomes in 12,998 older adults in the U.S. with a mean age of 66.

Researchers note that most investigations on hope have focused on psychological and social well-being outcomes and less attention has been paid to its impact on physical and behavioral health, particularly among older adults.

The findings: Results show a positive association between an increased sense of hope and a variety of behavioral and psychosocial outcomes, such as fewer sleep problems, more physical activity, optimism and satisfaction with life. However, there wasn’t a clear association between hope and all physical health outcomes. For instance, hope was associated with a reduced number of chronic conditions, but not with stroke, diabetes and hypertension.

The takeaway: “The later stages of life are often defined by loss: the loss of health, loved ones, social support networks, independence, and (eventually) loss of life itself,” the authors write. “Our results suggest that standard public health promotion activities, which often focus solely on physical health, might be expanded to include a wider range of factors that may lead to gains in hope. For example, alongside community-based health and nutrition programs aimed at reducing chronic conditions like hypertension, programs that help strengthen marital relations (e.g., closeness with a spouse), provide opportunities to volunteer, help lower anxiety, or increase connection with friends may potentially increase levels of hope, which in turn, may improve levels of health and well-being in a variety of domains.”

Associated Factors of Hope in Cancer Patients During Treatment: A Systematic Literature Review
Corine Nierop-van Baalen, Maria Grypdonck, Ann van Hecke and Sofie Verhaeghe. Journal of Advanced Nursing, March 2020.

The study: The authors review 33 studies, written in English or Dutch and published in the past decade, on the relationship between hope and the quality of life and well-being of patients with cancer. Studies have shown that many cancer patients respond to their diagnosis by nurturing hope, while many health professionals feel uneasy when patients’ hopes go far beyond their prognosis, the authors write.

The findings: Quality of life, social support and spiritual well-being were positively associated with hope, as measured with various scales. Whereas symptoms, psychological distress and depression had a negative association with hope. Hope didn’t seem to be affected by the type or stage of cancer or the patient’s demographics.

The takeaway: “Hope seems to be a process that is determined by a person’s inner being rather than influenced from the outside,” the authors write. “These factors are typically given meaning by the patients themselves. Social support, for example, is not about how many patients experience support, but that this support has real meaning for them.”

Characterizing Hope: An Interdisciplinary Overview of the Characteristics of Hope
Emma Pleeging, Job van Exel and Martijn Burger. Applied Research in Quality of Life, September 2021.

The study: This systematic review provides an overview of the concept of hope based on 66 academic papers in ten academic fields, including economics and business studies, environmental studies, health studies, history, humanities, philosophy, political science, psychology, social science, theology and youth studies, resulting in seven themes and 41 sub-themes.

The findings: The authors boil down their findings to seven components: internal and external sources, the individual and social experience of hope, internal and external effects, and the object of hope, which can be “just about anything we can imagine,” the authors write.

The takeaway: “An important implication of these results lies in the way hope is measured in applied and scientific research,” researchers write. “When measuring hope or developing instruments to measure it, researchers could be well-advised to take note of the broader understanding of the topic, to prevent that important characteristics might be overlooked.”

Revisiting the Paradox of Hope: The Role of Discrimination Among First-Year Black College Students
Ryon C. McDermott, et al. Journal of Counseling Psychology, March 2020.

The study: Researchers examine the moderating effects of hope on the association between experiencing racial discrimination, stress and academic well-being among 203 first-year U.S. Black college students. They build on a small body of evidence that suggests high levels of hope might have a negative effect on Black college students who experience racial discrimination.

The authors use data gathered as part of an annual paper-and-pencil survey of first-year college students at a university on the Gulf Coast, which the study doesn’t identify.

The findings: Researchers find that Black students who had higher levels of hope experienced more stress due to racial discrimination compared with students who had lower levels of hope. On the other hand, Black students with low levels of hope may be less likely to experience stress when they encounter discrimination.

Meanwhile, Black students who had high levels of hope were more successful in academic integration — which researchers define as satisfaction with and integration into the academic aspects of college life — despite facing discrimination. But low levels of hope had a negative impact on students’ academic well-being.

“The present study found evidence that a core construct in positive psychology, hope, may not always protect Black students from experiencing the psychological sting of discrimination, but it was still beneficial to their academic well-being,” the authors write.

The takeaway: “Our findings also highlight an urgent need to reduce discrimination on college campuses,” the researchers write. “Reducing discrimination could help Black students (and other racial minorities) avoid additional stress, as well as help them realize the full psychological and academic benefits of having high levels of hope.”

Additional reading

Hope Across Cultural Groups Lisa M. Edwards and Kat McConnell. Current Opinion in Psychology, February 2023.

The Psychology of Hope: A Diagnostic and Prescriptive Account Anthony Scioli. “Historical and Multidisciplinary Perspectives on Hope,” July 2020.

Hope Theory: Rainbows in the Mind C.R. Snyder. Psychological Inquiry, 2002

This article first appeared on The Journalist’s Resource and is republished here under a Creative Commons license.

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  • Air Purifiers & Sleep

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    It’s Q&A Day at 10almonds!

    Have a question or a request? We love to hear from you!

    In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!

    As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!

    So, no question/request too big or small

    ❝I’ve read that air pollution has a negative effect on sleep quality and duration. Since I live next to a busy road, I was wondering whether I should invest in an air purifier. What are 10Almonds’s views?❞

    Going straight to the science, there are two questions here:

    • Does air pollution negatively affect sleep quality and duration?
    • Does the use of an air purify actually improve the air quality in the way(s) necessary to make a difference?

    We thought we’d have to tackle these questions separately, but we did find one study that addressed your question directly. It was a small study (n=30 if you believe the abstract; n=29 if you read the paper itself—one person dropped out); the results were modest but clear:

    ❝The purifier filter was associated with increased total sleep time for an average of 12 min per night, and increased total time in bed for an average of 19 min per night relative to the placebo.

    There were several sleep and mood outcomes for which no changes were observed, and time awake after sleep onset was higher for the purifier filter. Air quality was better during the high-efficiency particulate air filter condition.

    These findings offer positive indications that environmental interventions that improve air quality can have benefits for sleep outcomes in healthy populations who are not exhibiting clinical sleep disturbances.❞

    Source: Can air purification improve sleep quality? A 2-week randomised-controlled crossover pilot study in healthy adults

    In the above-linked paper’s introduction, it does establish the deleterious effect of air pollution on a wide variety of health metrics, including sleep, this latter evidenced per Caddick et al. (2018): A review of the environmental parameters necessary for an optimal sleep environment

    Now, you may be wondering: is an extra 12 minutes per night worth it?

    That’s your choice to make, but we would argue that it is. We can make many choices in our lives that affect our health slightly for the better or the worse. If we make a stack of choices in a particular direction, the effects will also stack, if not outright compound.

    So in the case of sleep, it might be (arbitrary numbers for the sake of illustration):

    • Get good exercise earlier in the day (+3%)
    • Get good food earlier in the day (+2.5%)
    • Practice mindfulness/meditation before bed (+2.5%)
    • Have a nice dark room (+5%)
    • Have fresh bedding (+2.5%)
    • Have an air purifier running (+3%)

    Now, those numbers are, as we said, arbitrary*, but remember that percentages don’t add up; they compound. So that “+3%” starts being a lot more meaningful than if it were just by itself.

    *Confession: the figure of 3% for the air purifier wasn’t entirely arbitrary; it was based on 100(12/405) = 80/27 ≈ 3, wherein the 405 figure was an approximation of the average total time (in minutes) spent sleeping with placebo, based on a peep at their results graph. There are several ways the average could be reasonably calculated, but 6h45 (i.e., 405 minutes) was an approximate average of those reasonable approximate averages.

    So, 12 minutes is a 3% improvement on that.

    Don’t have an air purifier and want one?

    We don’t sell them, but here’s an example on Amazon, for your convenience

    Take care!

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  • A cartoon of a woman nurse working at a desk with health insurance rejections.

    Woman Petitions Health Insurer After Company Approves — Then Rejects — Her Infusions

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    When KFF Health News published an article in August about the “prior authorization hell” Sally Nix said she went through to secure approval from her insurance company for the expensive monthly infusions she needs, we thought her story had a happy ending.

    That’s because, after KFF Health News sent questions to Nix’s insurance company, Blue Cross Blue Shield of Illinois, it retroactively approved $36,000 worth of treatments she thought she owed. Even better, she also learned she would qualify for the infusions moving forward.

    Good news all around — except it didn’t last for long. After all, this is the U.S. health care system, where even patients with good insurance aren’t guaranteed affordable care.

    To recap: For more than a decade, Nix, of Statesville, North Carolina, has suffered from autoimmune diseases, chronic pain, and fatigue, as well as a condition called trigeminal neuralgia, which is marked by bouts of electric shock-like pain that’s so intense it’s commonly known as the “suicide disease.”

    “It is a pain that sends me to my knees,” Nix said in October. “My entire family’s life is controlled by the betrayal of my body. We haven’t lived normally in 10 years.”

    Late in 2022, Nix started receiving intravenous immunoglobulin infusions to treat her diseases. She started walking two miles a day with her service dog. She could picture herself celebrating, free from pain, at her daughter’s summer 2024 wedding.

    “I was so hopeful,” she said.

    But a few months after starting those infusions, she found out that her insurance company wouldn’t cover their cost anymore. That’s when she started “raising Cain about it” on Instagram and Facebook.

    You probably know someone like Sally Nix — someone with a chronic or life-threatening illness whose doctor says they need a drug, procedure, or scan, and whose insurance company has replied: No.

    Prior authorization was conceived decades ago to rein in health care costs by eliminating duplicative and ineffective treatment. Not only does overtreatment waste billions of dollars every year, but doctors acknowledge it also potentially harms patients.

    However, critics worry that prior authorization has now become a way for health insurance companies to save money, sometimes at the expense of patients’ lives. KFF Health News has heard from hundreds of people in the past year relating their prior authorization horror stories.

    When we first met Nix, she was battling her insurance company to regain authorization for her infusions. She’d been forced to pause her treatments, unable to afford $13,000 out-of-pocket for each infusion.

    Finally, it seemed like months of her hard work had paid off. In July, Nix was told by staff at both her doctor’s office and her hospital that Blue Cross Blue Shield of Illinois would allow her to restart treatment. Her balance was marked “paid” and disappeared from the insurer’s online portal.

    But the day after the KFF Health News story was published, Nix said, she learned the message had changed. After restarting treatment, she received a letter from the insurer saying her diagnoses didn’t actually qualify her for the infusions. It felt like health insurance whiplash.

    “They’re robbing me of my life,” she said. “They’re robbing me of so much, all because of profit.”

    Dave Van de Walle, a spokesperson for Blue Cross Blue Shield of Illinois, said the company would not discuss individual patients’ cases.

    “Prior authorization is often a requirement for certain treatments,” Van de Walle said in a written statement, “and BCBSIL administers benefits according to medical policy and the employer’s benefit.”

    But Nix is a Southern woman of the “Steel Magnolia” variety. In other words, she’s not going down without a fight.

    In September, she called out her insurance company’s tactics in a http://change.org/ campaign that has garnered more than 21,000 signatures. She has also filed complaints against her insurance company with the U.S. Department of Health and Human Services, U.S. Department of Labor, Illinois Department of Insurance, and Illinois attorney general.

    Even so, Nix said, she feels defeated.

    Not only is she still waiting for prior authorization to restart her immunoglobulin infusions, but her insurance company recently required Nix to secure preapproval for another treatment — routine numbing injections she has received for nearly 10 years to treat the nerve pain caused by trigeminal neuralgia.

    “It is reprehensible what they’re doing. But they’re not only doing it to me,” said Nix, who is now reluctantly taking prescription opioids to ease her pain. “They’re doing it to other patients. And it’s got to stop.”

    Do you have an experience with prior authorization you’d like to share? Click here to tell your story.

    KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.

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  • Eat Move Sleep – by Tom Rath

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    The subtitle of this book, “how small choices lead to big changes“, is very much the idea that a lot of what we do here at 10almonds is about.

    And the title itself, “Eat Move Sleep”? Well, that’s 3/5 of The Usual Five Things™ that we promote here (the other two being: reduce or eliminate alcohol, and don’t smoke). So, naturally this book got our attention.

    One of the key ideas that Rath presents is that every action we take leads to a net gain or loss in health. The question then is: what are the biggest point-swingers? In other words, what are the places in our life where the smallest changes can make the biggest difference?

    Rath looks at what parts of diet make the biggest difference to our health, and the findings there alone probably make reading the book worthwhile.

    When it comes to movement, he actually flips this! For Rath, it’s less about how much exercise you get, and more about minimizing how long we spend not moving… And especially, minimizing how long we spend sitting. So, lots of little tweaks for that.

    In the category of sleep: a key idea is that quality is as important as quantity, and there’s an aspect of bringing together as a synergistic routine. To finish off a productive day with good rest, and power up ready for the next morning.

    In short: tying these items together—and focusing on the smallest choices that lead to the biggest changes—makes for quite a manifesto that we could describe as “Atomic Habits, for health specifically”.

    Click here to check out Eat Move Sleep on Amazon!

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  • Oven-Roasted Ratatouille

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    This is a supremely low-effort, high-yield dish. It’s a nutritional tour-de-force, and very pleasing to the tastebuds too. We use flageolet beans in this recipe; they are small immature kidney beans. If they’re not available, using kidney beans or really any other legume is fine.

    You will need

    • 2 large zucchini, sliced
    • 2 red peppers, sliced
    • 1 large eggplant, sliced and cut into semicircles
    • 1 red onion, thinly sliced
    • 2 cans chopped tomatoes
    • 2 cans flageolet beans, drained and rinsed (or 2 cups same, cooked, drained, and rinsed)
    • ½ bulb garlic, crushed
    • 2 tbsp extra virgin olive oil
    • 1 tbsp balsamic vinegar
    • 1 tbsp black pepper, coarse ground
    • 1 tbsp nutritional yeast
    • 1 tbsp red chili pepper flakes (omit or adjust per your heat preferences)
    • ½ tsp MSG or 1 tsp low-sodium salt
    • Mixed herbs, per your preference. It’s hard to go wrong with this one, but we suggest leaning towards either basil and oregano or rosemary and thyme. We also suggest having some finely chopped to go into the dish, and some held back to go on the dish as a garnish.

    Method

    (we suggest you read everything at least once before doing anything)

    1) Preheat the oven to 350℉ / 180℃.

    2) Mix all the ingredients (except the tomatoes and herbs) in a big mixing bowl, ensuring even distribution.

    2) Add the tomatoes. The reason we didn’t add these before is because it would interfere with the oil being distributed evenly across the vegetables.

    3) Transfer to a deep-walled oven tray or an ovenproof dish, and roast for 30 minutes.

    4) Stir, add the chopped herbs, stir again, and return to the oven for another 30 minutes.

    5) Serve (hot or cold), adding any herb garnish you wish to use.

    Enjoy!

    Want to learn more?

    For those interested in some of the science of what we have going on today:

    Take care!

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  • Gut-Positive Pot Noodles

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Everything we consume either improves our health a little or worsens it. Pot noodles aren’t generally the healthiest foods, but these ones sure are! There’s quite a range of fiber in this, including the soluble fiber of the noodles themselves (which are, in fact, mostly fiber and water). As a bonus, the glucomannan in the noodles promotes feelings of fullness, notwithstanding its negligible carb count. Of course, the protein in the edamame beans also counts for satiety!

    You will need

    • ½ cup konjac noodles (also called shirataki), tossed in 1 tsp avocado oil (or sesame oil, if you don’t have avocado)
    • 2 oz mangetout, thinly sliced
    • 1 oz edamame beans
    • ¼ carrot, grated
    • 2 baby sweetcorn, cut in half lengthways
    • 1 scallion, finely diced
    • 1 heaped tsp crunchy peanut butter (omit if allergic)
    • 1 tsp miso paste
    • 1 tsp chili oil
    • 1 tsp black pepper, coarse ground
    • 1 tsp peeled-and-grated ginger

    Method

    (we suggest you read everything at least once before doing anything)

    1) Layer a heat-resistant jar (mason jars are usually quite resistant to temperature changes) with the noodles and vegetables.

    2) Combine the peanut butter, miso paste, and chili oil, black pepper, and ginger in a small bowl. Pour this dressing over the layered vegetables and noodles, and screw the lid on. Refrigerate until needed.

    3) Add hot water to the jar and stir, to serve. If you prefer the vegetables to be more cooked, you can microwave (without the lid!) for a minute or two.

    Enjoy!

    Want to learn more?

    For those interested in some of the science of what we have going on today:

    Take care!

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  • We Are Such Stuff As Fish Are Made Of

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    Research Review: Collagen

    For something that’s a very popular supplement, not many people understand what collagen is, where it comes from, or what it does.

    In a nutshell:

    Collagen is a kind of protein. Our bodies make it naturally, and we can also get more in our diet and/or take extra as a supplement.

    Our bodies use collagen in connective tissue, skin, tendon, bone, and cartilage. It has many functions, but a broad description would be “holding things together”.

    As we get older, our bodies produce less collagen. Signs of this include wrinkles, loss of skin hydration, and joint pain.

    Quick test: pinch the skin on the middle of the back of one of your hands, and then watch what happens when you get low. How quickly and easily did your skin returns to its original shape?

    If it was pretty much instantanous and flawless, congratulations, you have plenty of collagen (and also elastin). If you didn’t, you are probably low on both!

    (they are quite similar proteins and are made from the same base “stuff”, so if you’re low on one, you’ll usually be low on both)

    Quick note: A lot of research out there has been funded by beauty companies, so we had our work cut out for us today, and have highlighted where any research may be biased.

    More than skin deep

    While marketing for collagen is almost exclusively aimed at “reduce wrinkles and other signs of aging”, it does a lot more than that.

    You remember we mentioned that many things from the bones outward are held together by collagen? We weren’t kidding…

    Read: Osteoporosis, like skin ageing, is caused by collagen loss which is reversible

    Taking extra collagen isn’t the only way

    We can’t (yet!) completely halt the age-related loss of collagen, but we can slow it, with our lifestyle choices:

    Can I get collagen from food?

    Yep! Just as collagen holds our bodies together, it holds the bodies of other animals together. And, just like collagen is found in most parts of our body but most plentifully in our skin and bones, that’s what to eat to get collagen from other animals, e.g:

    • Chicken skin
    • Fish skin
    • Bone broth ← health benefits and recipes at this link!

    What about vegans?

    Yes, vegans are also held together by collagen! We do not, however, recommend eating their skin or boiling their bones into broth. Ethical considerations aside, cannibalism can give you CJD!

    More seriously, if you’re vegan, you can’t get collagen from a plant-based diet, but you can get the stuff your body uses to make collagen. Basically, you want to make sure you get plenty of:

    Read: Diet and Dermatology: The Role of a Whole-food, Plant-based Diet in Preventing and Reversing Skin Aging

    Just be sure to continue to remember to avoid highly-processed foods. So:

    • Soy mince/chunks whose ingredients list reads: “soya”? Yes!
    • The Incredible Burger or Linda McCartney’s Sausages? Sadly less healthy

    Read: Advanced Glycation End Products in Foods and a Practical Guide to Their Reduction in the Diet

    Meat-eaters might want to read that one too. By far the worst offenders for AGEs (Advanced Glycation End Products, which can not only cause collagen to stiffen, but also inactivate proteins responsible for collagen repair, along with doing much more serious damage to your body’s natural functions) include:

    • Hot dogs
    • Bacon
    • Fried/roasted/grilled meats

    Is it worth it as a supplement?

    That depends on you, your age, and your lifestyle, but it’s generally considered safe*

    *if you have a seafood allergy, be careful though, as many supplements are from fish or shellfish—you will need to find one that’s free from your allergen

    Also, all collagen is animal-derived. So if you’re a vegan, decide for yourself whether this constitutes medicine and if so, whether that makes it ethically permissible to you.

    With that out of the way:

    What the science says on collagen supplementation

    Collagen for skin

    Read: Effects of collagen supplementation on skin aging (systematic review and meta-analysis)

    The short version is that they selected 19 studies with over a thousand participants in total, and they found:

    In the meta-analysis, a grouped analysis of studies showed favorable results of hydrolyzed collagen supplementation compared with placebo in terms of skin hydration, elasticity, and wrinkles.

    The findings of improved hydration and elasticity were also confirmed in the subgroup meta-analysis.

    Based on results, ingestion of hydrolyzed collagen for 90 days is effective in reducing skin aging, as it reduces wrinkles and improves skin elasticity and hydration.

    Caveat: while that systematic review had no conflicts of interests, at least some of the 19 studies will have been funded by beauty companies. Here are two, so that you know what that looks like:

    Funded by Quiris to investigate their own supplement, Elasten®:

    A Collagen Supplement Improves Skin Hydration, Elasticity, Roughness, and Density

    Funded by BioCell to investigate their own supplement, BioCell Collagen:

    The Effects of Skin Aging Associated with the Use of BioCell Collagen

    A note on funding bias: to be clear, the issue is not that the researchers might be corrupt (though that could happen).

    The issue is more that sometimes companies will hire ten labs to do ten research studies… and then pull funding from ones whose results aren’t going the way they’d like.

    So the “best” (for them) study is the one that gets published.

    Here’s another systematic review—like the one at the top of this section—that found the same, with doses ranging from 2.5g–15g per day for 8 weeks or longer:

    Read: Oral Collagen Supplementation: A Systematic Review of Dermatological Applications

    Again, some of those studies will have been funded by beauty companies. The general weight of evidence does seem clear and favorable, though.

    Collagen for bones

    Here, we encountered a lot less in the way of potential bias, because this is simply marketed a lot less. Despite being arguably far more important!

    We found a high quality multi-vector randomized controlled study with a sample size of 131 postmenopausal women. They had these women take 5g collagen supplement (or placebo), and studied the results over the course of a year.

    They found:

    • The intake of the supplement increased bone mineral density (BMD)
    • Supplementation was also associated with a favorable shift in bone markers, indicating:
      • increased bone formation
      • reduced bone degradation

    Read: Specific Collagen Peptides Improve Bone Mineral Density and Bone Markers in Postmenopausal Wome

    A follow-up study with 31 of these women found that taking 5 grams of collagen daily for a total of 4 years was associated with a progressive increase in BMD.

    You might be wondering if collagen also helps against osteoarthritis.

    The answer is: yes, it does (at least, it significantly reduces the symptoms)

    Read: Effect of collagen supplementation on osteoarthritis symptoms

    In summary:

    • You need collagen for health skin, bones, joints, and more
    • Your body makes collagen from your food
    • You can help it by getting plenty of protein, vitamins, and minerals
    • You can also help it by not doing the usual Bad Things™ (smoking, drinking, eating processed foods, especially processed meats)
    • You can also eat collagen directly in the form of other animals’ skin and bones
    • You can also buy collagen supplements (but watch out for allergens)

    Want to try collagen supplementation?

    We don’t sell it (or anything else), but for your convenience…

    Check it out: Hydrolyzed Collagen Peptides (the same as in most of the above studies), 90 days supply at 5g/day

    We selected this one because it’s the same kind used in many of the studies, and it doesn’t contain any known allergens.

    It’s bovine collagen, meaning it’s from cows, so it’s not vegan, and also some subscribers may want to abstain for religious reasons. We respect that, and/but make our recommendations based solely on the science of health and productivity.

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