Can Saturated Fats Be Healthy?
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Saturated Fat: What’s The Truth?
We asked you for your health-related opinion of saturated fat, and got the above-pictured, below-described, set of results.
- Most recorded votes were for “Saturated fat is good, but only some sources, and/or in moderation”
- This is an easy one to vote for, because of the “and/or in moderation” part, which tends to be a “safe bet” for most things.
- Next most popular was “Saturated fat is terrible for the health and should be avoided”
- About half as many recorded votes were for “I’m not actually sure what makes saturated fat different”, which is a very laudable option to click. Admitting when we don’t know things (and none of us know everything) is a very good first step to learning about them!
- Fewest recorded votes were for “Saturated fat is the best source of energy; we should get plenty”.
So, what does the science say?
First, a bit of physics, chemistry, and biology
You may be wondering what, exactly, saturated fats are “saturated” with. That’s a fair question, so…
All fats have a molecular structure made up of carbon, hydrogen, and oxygen atoms. Saturated fats are saturated with hydrogen, and thus have only single bonds between carbon atoms (unsaturated fats have at least one double-bond between carbon atoms).
The observable effect this has on them, is that fats that are saturated with hydrogen are solid at room temperature, whereas unsaturated fats are liquid at room temperature. Their different properties also make for different interactions inside the human body, including how likely or not they are to (for example) clog arteries.
See also: Could fat in your bloodstream cause blood clots?
Saturated fat is the best source of energy; we should get plenty: True or False?
False, in any reasonable interpretation, anyway. That is to say, if your idea of “plenty” is under 13g (e.g: two tablespoons of butter, and no saturated fat from other sources, e.g. meat) per day, then yes, by all means feel free to eat plenty. More than that, though, and you might want to consider trimming it down a bit.
The American Heart Association has this to say:
❝When you hear about the latest “diet of the day” or a new or odd-sounding theory about food, consider the source.
The American Heart Association recommends limiting saturated fats, which are found in butter, cheese, red meat and other animal-based foods, and tropical oils.
Decades of sound science has proven it can raise your “bad” cholesterol and put you at higher risk for heart disease.❞
Source: The American Heart Association Diet and Lifestyle Recommendations on Saturated Fat
The British Heart Foundation has a similar statement:
❝Despite what you read in the media, our advice is clear: replace saturated fats with unsaturated fats and avoid trans fats. Saturated fat is the kind of fat found in butter, lard, ghee, fatty meats and cheese. This is linked to an increased risk of heart and circulatory disease❞
Source: British Heart Foundation: What does fat do and what is saturated fat?
As for the World Health Organization:
❝1. WHO strongly recommends that adults and children reduce saturated fatty acid intake to 10% of total energy intake
2. WHO suggests further reducing saturated fatty acid intake to less than 10% of total energy intake
3. WHO strongly recommends replacing saturated fatty acids in the diet with polyunsaturated fatty acids; monounsaturated fatty acids from plant sources; or carbohydrates from foods containing naturally occurring dietary fibre, such as whole grains, vegetables, fruits and pulses.❞
Source: Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline
Please note, organizations such as the AHA, the BHF, and the WHO are not trying to sell us anything, and just would like us to not die of heart disease, the world’s #1 killer.
As for “the best source of energy”…
We evolved to eat (much like our nearest primate cousins) a diet consisting mostly of fruits and other edible plants, with a small supplementary amount of animal-source protein and fats.
That’s not to say that because we evolved that way we have to eat that way—we are versatile omnivores. But for example, we are certainly not complete carnivores, and would quickly sicken and die if we tried to live on only meat and animal fat (we need more fiber, more carbohydrates, and many micronutrients that we usually get from plants)
The closest that humans tend to come to doing such is the ketogenic diet, which focuses on a high fat, low carbohydrate imbalance, to promote ketosis, in which the body burns fat for energy.
The ketogenic diet does work, and/but can cause a lot of health problems if a lot of care is not taken to avoid them.
See for example: 7 Keto Risks To Keep In Mind
Saturated fat is terrible for the health and should be avoided: True or False?
False, if we are talking about “completely”.
Firstly, it’s practically impossible to cut out all saturated fats, given that most dietary sources of fat are a mix of saturated, unsaturated (mono- and poly-), and trans fats (which are by far the worst, but beyond the scope of today’s main feature).
Secondly, a lot of research has been conducted and found insignificant or inconclusive results, in cases where saturated fat intake was already within acceptable levels (per the recommendations we mentioned earlier), and then cut down further.
Rather than fill up the newsletter with individual studies of this kind here’s a high-quality research review, looking at 19 meta-analyses, each of those meta-analyses having looked at many studies:
Dietary saturated fat and heart disease: a narrative review
Saturated fat is good, but only some sources, and/or in moderation: True or False?
True! The moderation part is easy to guess, so let’s take a look at the “but only some sources”.
We were not able to find any convincing science to argue for health-based reasons to favor plant- or animal-sourced saturated fat. However…
Not all saturated fats are created equal (there are many kinds), and also many of the foods containing them have additional nutrients, or harmful compounds, that make a big difference to overall health, when compared gram-for-gram in terms of containing the same amount of saturated fat.
For example:
- Palm oil’s saturated fat contains a disproportionate amount of palmitic acid, which raises LDL (“bad” cholesterol) without affecting HDL (“good” cholesterol), thus having an overall heart-harmful effect.
- Most animal fats contain a disproportionate amount of stearic acid, which has statistically insignificant effects on LDL and HDL levels, and thus is broadly considered “heart neutral” (in moderation!)
- Coconut oil’s saturated fat contains a disproportionate amount of lauric acid, which raises total cholesterol, but mostly HDL without affecting LDL, thus having an overall heart-beneficial effect (in moderation!)
Do you know what’s in the food you eat?
Test your knowledge with the BHF’s saturated fat quiz!
Enjoy!
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Bacopa Monnieri: A Well-Evidenced Cognitive Enhancer
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Bacopa monnieri: a powerful nootropic
Bacopa monnieri is one of those “from traditional use” herbs that has made its way into science.
It’s been used for at least 1,400 years in Ayurvedic medicine, for cognitive enhancement, against anxiety, and some disease-specific treatments.
See: Pharmacological attributes of Bacopa monnieri extract: current updates and clinical manifestation
What are its claimed health benefits?
Bacopa monnieri is these days mostly sold and bought as a nootropic, and that’s what the science supports best.
Nootropic benefits claimed:
- Improves attention, learning, and memory
- Reduces depression, anxiety, and stress
- Reduces restlessness and impulsivity
Other benefits claimed:
- Antioxidant properties
- Anti-inflammatory properties
- Anticancer properties
What does the science say?
Those last three, the antioxidant / anti-inflammatory / anticancer properties, when something has one of those qualities it often has all three, because there are overlapping systems at hand when it comes to oxidative stress, inflammation, and cellular damage.
Bacopa monnieri is no exception to this “rule of thumb”, and/but studies to support these benefits have mostly been animal studies and/or in vitro studies (i.e., cell cultures in a petri dish in lab conditions).
For example:
- Inhibition of lipoxygenases and cyclooxygenase-2 enzymes by extracts isolated from Bacopa monnieri
- Assessing the anti-inflammatory effects of Bacopa-derived bioactive compounds using network pharmacology and in vitro studies
- The evolving roles of Bacopa monnieri as potential anticancer agent: a review
In the category of antioxidant and anti-inflammatory effects in the brain, sometimes results differ depending on the test population, for example:
- Neuroprotective effects of Bacopa monnieri in experimental model of dementia (it worked for rats)
- Use of Bacopa monnieri in the treatment of dementia due to Alzheimer’s disease: systematic review of randomized controlled trials (it didn’t work for humans)
Anything more promising than that?
Yes! The nootropic effects have been much better-studied in humans, and with much better results.
For example, in this 12-week study in healthy adults, taking 300mg/day significantly improved visual information processing, learning, and memory (tested against placebo):
The chronic effects of an extract of Bacopa monnieri on cognitive function in healthy human subjects
Another 12-week study showed older adults enjoyed the same cognitive enhancement benefits as their younger peers:
Children taking 225mg/day, meanwhile, saw a significant reduction in ADHD symptoms, such as restlessness and impulsivity:
And as for the mood benefits, 300mg/day significantly reduced anxiety and depression in elderly adults:
In summary
Bacopa monnieri, taken at 300mg/day (studies ranged from 225mg/day to 600mg/day, but 300mg is most common) has well-evidenced cognitive benefits, including:
- Improved attention, learning, and memory
- Reduced depression, anxiety, and stress
- Reduced restlessness and impulsivity
It may also have other benefits, including against oxidative stress, inflammation, and cancer, but the research is thinner and/or not as conclusive for those.
Where to get it
As ever, we don’t sell it (or anything else), but for your convenience, here is an example product on Amazon.
Enjoy!
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How To Avoid Age-Related Macular Degeneration
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Avoiding Age-Related Macular Degeneration
Eye problems can strike at any age, but as we get older, it becomes a lot more likely. In particular, age-related macular degeneration is, as the name suggests, an age-bound disease.
Is there no escaping it, then?
The risk factors for age-related macular degeneration are as follows:
- Being over the age of 55 (can’t do much about this one)
- Being over the age of 65 (risk climbs sharply now)
- Having a genetic predisposition (can’t do much about this one)
- Having high cholesterol (this one we can tackle)
- Having cardiovascular disease (this one we can tackle)
- Smoking (so, just don’t)
Genes predispose; they don’t predetermine. Or to put it another way: genes load the gun, but lifestyle pulls the trigger.
Preventative interventions against age-related macular degeneration
Prevention is better than a cure in general, and this especially goes for things like age-related macular degeneration, because the most common form of it has no known cure.
So first, look after your heart (because your heart feeds your eyes).
See also: The Mediterranean Diet
Next, eat to feed your eyes specifically. There’s a lot of research to show that lutein helps avoid age-related diseases in the eyes and the rest of the brain, too:
See also: Brain Food? The Eyes Have It
Do supplements help?
They can! There was a multiple-part landmark study by the National Eye Institute, a formula was developed that reduced the 5-year risk of intermediate disease progressing to late disease by 25–30%. It also reduced the risk of vision loss by 19%.
You can read about both parts of the study here:
Age-Related Eye Disease Studies (AREDS/AREDS2): major findings
As you can see, an improvement was made between the initial study and the second one, by replacing beta-carotene with lutein and zeaxanthin.
The AREDS2 formula contains:
- 500 mg vitamin C
- 180 mg vitamin E
- 80 mg zinc
- 10 mg lutein
- 2 mg copper
You can learn more about these supplements, and where to get them, here on the NEI’s corner of the official NIH website:
AREDS 2 Supplements for Age-Related Macular Degeneration
Take care of yourself!
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Salt Sugar Fat – by Michael Moss
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You are probably already aware that food giants put unhealthy ingredients in processed food. So what does this book offer of value?
Sometimes, better understanding leads to better movation. In this case, while a common (reasonable) view has been:
“The food giants fill their food with salt, sugar, and fat, because it makes that food irresistibly delicious”
…but that doesn’t exactly put us off the food, does it? It just makes it a guilty pleasure. Ah yes, the irresistible McDouble Dopamineburger. The time-honored tradition of Pizza Night; a happy glow; a special treat.
What Pulitzer-winning author Michael Moss brings to us is different.
He examines not just how they hooked us, but why. And the answer is not merely the obvious “profit and greed”, but also “survival, under capitalism”. That without regulation forcing companies to keep salt/sugar/fat levels down, companies that have tried to do so voluntarily have quickly had to u-turn to regain any hope of competitiveness.
He also looks at how the salt/sugar/fat components are needed to mask the foul taste of the substandard ingredients they use to maintain lower costs… Processed food, without the heavy doses of salt/sugar/fat, is not anywhere close to what you might make at home. Industry will cut costs where it can.
Bottom line: if you need a push to kick the processed food habit, this is the book that will do it.
Click here to check out Salt Sugar Fat, and reclaim your health!
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Eat All You Want (But Wisely)
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Some Surprising Truths About Hunger And Satiety
This is Dr. Barbara Rolls. She’s Professor and Guthrie Chair in Nutritional Sciences, and Director of the Laboratory for the Study of Human Ingestive Behavior at Pennsylvania State University, after graduating herself from Oxford and Cambridge (yes, both). Her “awards and honors” take up four A4 pages, so we won’t list them all here.
Most importantly, she’s an expert on hunger, satiety, and eating behavior in general.
What does she want us to know?
First and foremost: you cannot starve yourself thin, unless you literally starve yourself to death.
What this is about: any weight lost due to malnutrition (“not eating enough” is malnutrition) will always go back on once food becomes available. So unless you die first (not a great health plan), merely restricting good will always result in “yo-yo dieting”.
So, to avoid putting the weight back on and feeling miserable every day along the way… You need to eat as much as you feel you need.
But, there’s a trick here (it’s about making you genuinely feel you need less)!
Your body is an instrument—so play it
Your body is the tool you use to accomplish pretty much anything you do. It is, in large part, at your command. Then there are other parts you can’t control directly.
Dr. Rolls advises taking advantage of the fact that much of your body is a mindless machine that will simply follow instructions given.
That includes instructions like “feel hungry” or “feel full”. But how to choose those?
Volume matters
An important part of our satiety signalling is based on a physical sensation of fullness. This, by the way, is why bariatric surgery (making a stomach a small fraction of the size it was before) works. It’s not that people can’t eat more (the stomach is stretchy and can also be filled repeatedly), it’s that they don’t want to eat more because the pressure sensors around the stomach feel full, and signal the hormone leptin to tell the brain we’re full now.
Now consider:
- On the one hand, 20 grapes, fresh and bursting with flavor
- On the other hand, 20 raisins (so, dried grapes), containing the same calories
Which do you think will get the leptin flowing sooner? Of course, the fresh grapes, because of the volume.
So if you’ve ever seen those photos that show two foods side by side with the same number of calories but one is much larger (say, a small slice of pizza or a big salad), it’s not quite the cheap trick that it might have appeared.
Or rather… It is a cheap trick; it’s just a cheap trick that works because your stomach is quite a simple organ.
So, Dr. Rolls’ advice: generally speaking, go for voluminous food. Fruit is great from this, because there’s so much water. Air-popped popcorn also works great. Vegetables, too.
Water matters, but differently than you might think
A well-known trick is to drink water before and with a meal. That’s good, it’s good to be hydrated. However, it can be better. Dr. Rolls did an experiment:
The design:
❝Subjects received 1 of 3 isoenergetic (1128 kJ) preloads 17 min before lunch on 3 d and no preload on 1 d.
The preloads consisted of 1) chicken rice casserole, 2) chicken rice casserole served with a glass of water (356 g), and 3) chicken rice soup.
The soup contained the same ingredients (type and amount) as the casserole that was served with water.❞
The results:
❝Decreasing the energy density of and increasing the volume of the preload by adding water to it significantly increased fullness and reduced hunger and subsequent energy intake at lunch.
The equivalent amount of water served as a beverage with a food did not affect satiety.❞
The conclusion:
❝Consuming foods with a high water content more effectively reduced subsequent energy intake than did drinking water with food.❞
You can read the study in full (it’s a worthwhile read!) here:
Water incorporated into a food but not served with a food decreases energy intake in lean women
Protein matters
With all those fruits and vegetables and water, you may be wondering Dr. Rolls’ stance on proteins. It’s simple: protein is an appetite suppressant.
However, it takes about 20 minutes to signal the brain about that, so having some protein in a starter (if like this writer, you’re the cook of the household, a great option is to enjoy a small portion of nuts while cooking!) gets that clock ticking, to signal satiety sooner.
It may also help in other ways:
Clinical Evidence and Mechanisms of High-Protein Diet-Induced Weight Loss
As for other foods that can suppress appetite, by the way, you might like;
25 Foods That Act As Natural Appetite Suppressants
Variety matters, and in ways other than you might think
A wide variety of foods (especially: a wide variety of plants) in one’s diet is well recognized as a key to a good balanced diet.
However…
A wide variety of dishes at the table, meanwhile, promotes greater consumption of food.
Dr. Rolls did a study on this too, a while ago now (you’ll see how old it is) but the science seems robust:
Variety in a Meal Enhances Food Intake in Man
Notwithstanding the title, it wasnot about a man (that was just how scientists wrote in ye ancient times of 1981). The test subjects were, in order: rats, cats, a mixed group of men and women, the same group again, and then a different group of all women.
So, Dr. Rolls’ advice is: it’s better to have one 20-ingredient dish, than 10 dishes with 20 ingredients between them.
Sorry! We love tapas and buffets too, but that’s the science!
So, “one-pot” meals are king in this regard; even if you serve it with one side (reasonable), that’s still only two dishes, which is pretty good going.
Note that the most delicious many-ingredient stir-fries and similar dishes from around the world also fall into this category!
Want to know more?
If you have the time (it’s an hour), you can enjoy a class of hers for free:
Want to watch it, but not right now? Bookmark it for later
Enjoy!
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Passion Fruit vs Persimmon – Which is Healthier?
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Our Verdict
When comparing passion fruit to persimmon, we picked the passion fruit.
Why?
You may be wondering: “what is this fruit passionate about?” and the answer is: delivering nutrients of many kinds!
Looking at the macros first, passion fruit has a little more protein and a lot more fiber, while persimmon has more carbs. This means that while persimmon’s glycemic index isn’t bad, passion fruit’s glycemic index is a lot lower.
In terms of vitamins, passion fruit has a lot more of vitamins A, B2, B3, B6, B9, E, K, and choline, while persimmon has more vitamin C. For the record passion fruit is also a good source of vitamin C, with a cup of passion fruit already giving a day’s daily dose of vitamin C, but persimmon gives twice that. Still, that’s a 8:1 win for passion fruit.
When it comes to minerals, passion fruit has more copper, magnesium, phosphorus, potassium, selenium, and zinc, while persimmon has more calcium and iron, meaning a 6:2 win for passion fruit.
Adding up the three convincing individual victories shows a clear overall win for passion fruit.
Enjoy (passionately, even)!
Want to learn more?
You might like to read:
- Glycemic Index vs Glycemic Load vs Insulin Index
- Which Sugars Are Healthier, And Which Are Just The Same?
- Why You’re Probably Not Getting Enough Fiber (And How To Fix It)
Take care!
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Kimchi Fried Rice
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Fried rice is not something that leaps to many people’s minds when one says “health food”. But it can be! Today’s recipe is great for many aspects of health, but especially the gut, because of its star ingredient, the kimchi—as well as the fiber in the rest of the dish, which is mostly a variety of vegetables, as well as the rice, which we are assuming you got wholegrain. An optional egg per person adds more healthy fats too!
You will need
- Avocado oil, for frying. We picked avocado oil for its healthy fats profile, neutral taste, and high smoke point (we’ll be working at very high temperatures today that might make olive oil or coconut oil smoke). We also recommend against seed oils (e.g. sunflower or canola) for health reasons.
- 1lb cooked and cooled rice—here’s our recipe for Tasty Versatile Rice if you don’t have leftovers you want to use
- 7oz kimchi, roughly chopped
- 4 spring onions, finely chopped
- 4oz white cabbage, finely shredded
- 3oz frozen peas, defrosted
- 1 bulb garlic, thinly sliced
- 1 carrot, grated
- ½ red pepper, finely diced
- 2 tbsp chili oil (or 2 tbsp extra virgin olive oil and 1 red chili, very finely chopped) ← don’t worry about the smoke point of this; it’s going to be for drizzling
- 1 tbsp dark soy sauce
- 2 tsp black pepper, coarse ground
- Optional: 1 egg per person
- Note: we didn’t forget to include salt; there’s simply enough already in the dish because of the kimchi and soy sauce.
Method
(we suggest you read everything at least once before doing anything)
1) Lightly oil a wok (or similar) and crank up the heat as high as your stove can muster. Add the garlic and spring onions; keep them moving. When they’re turning golden, add the cabbage, carrot, and red pepper. Add them one by one, giving the wok a chance to get back to temperature each time before adding the next ingredient.
2) When the vegetables are beginning to caramelize (if the temperature is good, this should only be a couple of minutes at most), add the rice, as well as the kimchi, peas, soy sauce, and black pepper. Toss everything ensure it’s all well-combined and evenly cooked. When it’s done (probably only another minute or two), take it off the heat.
3) Optional: if you’re adding eggs, fry them now. Serve a bowl of kimchi-fried rice per person, adding 1 fried egg on top of each.
4) Drizzle the chili oil as a colorful, tasty garnish that’s full of healthful polyphenols too.
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Making Friends With Your Gut (You Can Thank Us Later)
- The Many Health Benefits Of Garlic
- Black Pepper’s Impressive Anti-Cancer Arsenal (And More)
- Tasty Polyphenols ← this is about how foods that are pungent, bitter, spicy, etc tend to have the highest polyphenol contents
- Eggs: All Things In Moderation?
Take care!
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