Could not getting enough sleep increase your risk of type 2 diabetes?
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Not getting enough sleep is a common affliction in the modern age. If you don’t always get as many hours of shut-eye as you’d like, perhaps you were concerned by news of a recent study that found people who sleep less than six hours a night are at higher risk of type 2 diabetes.
So what can we make of these findings? It turns out the relationship between sleep and diabetes is complex.
The study
Researchers analysed data from the UK Biobank, a large biomedical database which serves as a global resource for health and medical research. They looked at information from 247,867 adults, following their health outcomes for more than a decade.
The researchers wanted to understand the associations between sleep duration and type 2 diabetes, and whether a healthy diet reduced the effects of short sleep on diabetes risk.
As part of their involvement in the UK Biobank, participants had been asked roughly how much sleep they get in 24 hours. Seven to eight hours was the average and considered normal sleep. Short sleep duration was broken up into three categories: mild (six hours), moderate (five hours) and extreme (three to four hours). The researchers analysed sleep data alongside information about people’s diets.
Some 3.2% of participants were diagnosed with type 2 diabetes during the follow-up period. Although healthy eating habits were associated with a lower overall risk of diabetes, when people ate healthily but slept less than six hours a day, their risk of type 2 diabetes increased compared to people in the normal sleep category.
The researchers found sleep duration of five hours was linked with a 16% higher risk of developing type 2 diabetes, while the risk for people who slept three to four hours was 41% higher, compared to people who slept seven to eight hours.
One limitation is the study defined a healthy diet based on the number of servings of fruit, vegetables, red meat and fish a person consumed over a day or a week. In doing so, it didn’t consider how dietary patterns such as time-restricted eating or the Mediterranean diet may modify the risk of diabetes among those who slept less.
Also, information on participants’ sleep quantity and diet was only captured at recruitment and may have changed over the course of the study. The authors acknowledge these limitations.
Why might short sleep increase diabetes risk?
In people with type 2 diabetes, the body becomes resistant to the effects of a hormone called insulin, and slowly loses the capacity to produce enough of it in the pancreas. Insulin is important because it regulates glucose (sugar) in our blood that comes from the food we eat by helping move it to cells throughout the body.
We don’t know the precise reasons why people who sleep less may be at higher risk of type 2 diabetes. But previous research has shown sleep-deprived people often have increased inflammatory markers and free fatty acids in their blood, which impair insulin sensitivity, leading to insulin resistance. This means the body struggles to use insulin properly to regulate blood glucose levels, and therefore increases the risk of type 2 diabetes.
Further, people who don’t sleep enough, as well as people who sleep in irregular patterns (such as shift workers), experience disruptions to their body’s natural rhythm, known as the circadian rhythm.
This can interfere with the release of hormones like cortisol, glucagon and growth hormones. These hormones are released through the day to meet the body’s changing energy needs, and normally keep blood glucose levels nicely balanced. If they’re compromised, this may reduce the body’s ability to handle glucose as the day progresses.
These factors, and others, may contribute to the increased risk of type 2 diabetes seen among people sleeping less than six hours.
While this study primarily focused on people who sleep eight hours or less, it’s possible longer sleepers may also face an increased risk of type 2 diabetes.
Research has previously shown a U-shaped correlation between sleep duration and type 2 diabetes risk. A review of multiple studies found getting between seven to eight hours of sleep daily was associated with the lowest risk. When people got less than seven hours sleep, or more than eight hours, the risk began to increase.
The reason sleeping longer is associated with increased risk of type 2 diabetes may be linked to weight gain, which is also correlated with longer sleep. Likewise, people who don’t sleep enough are more likely to be overweight or obese.
Good sleep, healthy diet
Getting enough sleep is an important part of a healthy lifestyle and may reduce the risk of type 2 diabetes.
Based on this study and other evidence, it seems that when it comes to diabetes risk, seven to eight hours of sleep may be the sweet spot. However, other factors could influence the relationship between sleep duration and diabetes risk, such as individual differences in sleep quality and lifestyle.
While this study’s findings question whether a healthy diet can mitigate the effects of a lack of sleep on diabetes risk, a wide range of evidence points to the benefits of healthy eating for overall health.
The authors of the study acknowledge it’s not always possible to get enough sleep, and suggest doing high-intensity interval exercise during the day may offset some of the potential effects of short sleep on diabetes risk.
In fact, exercise at any intensity can improve blood glucose levels.
Giuliana Murfet, Casual Academic, Faculty of Health, University of Technology Sydney and ShanShan Lin, Senior Lecturer, School of Public Health, University of Technology Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Nine Pints – by Rose George
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Rose George is not a scientist, but an investigative journalist. As such, she’s a leave-no-stone-unturned researcher, and that shows here.
The style throughout is, as one might expect, journalistic. But, she’s unafraid of diving into the science of it, interviewing many medical professionals as part of her work. She also looks to people living with various blood-related conditions, ranging from hemophilia to HIV.
Speakling of highly-stigmatized yet very manageable conditions, there’s also a fair section devoted to menstruation, menstrual blood, and societies’ responses to such, from shunning to active support.
We also learn about the industrialization of blood—from blood banks to plasma labs to leech farms. You probably knew leeches are still used as a medical tool in even the most high-tech of hospitals, but you’ll doubtlessly learn a fascinating thing or two from the “insider views” along the way.
Bottom line: if you’d like to know more about the red stuff in all its marvelous aspects, with neither sensationalization nor sanitization (the topic needs neither!), this is the book for you.
Click here to check out Nine Pints, and learn more about yours!
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Awakening Your Ikigai – by Dr. Ken Mogi
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It’s been well-established in supercentenarian studies that one of the key factors beyond diet or exercise or suchlike (important as those things definitely are), is having a purpose to one’s life.
Neuroscientist Dr. Ken Mogi explains in this very easy-to-read book, how we can bring ikigai into our lives.
From noticing the details of the small things in life, to reorienting one’s life around what’s most truly most important to us, Dr. Mogi gives us not just a “this is ikigai” exposé, but rather, a practical and readily applicable how-to guide.
Bottom line: if you’ve so far been putting off ikigai as “I’ll get to that”, the time to start is today.
Click here to check out Awakening Your Ikigai, and actually awaken yours!
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Healing Your Gut: Anastasia’s Journey and Tips
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Anastasia Gurova shares her inspiring journey from chronic gut issues to vibrant health.
A Personal Journey to Gut Health
In the below video, Anastasia shares her long struggle with gut problems, including SIBO, IBS, and gastritis. She talks about ending up in the hospital with severe bloating, only to find that a range of medical approaches didn’t provide her with any lasting relief. This led her to explore the importance of the microbiome and its crucial role in gut health, which is what we’ll be focusing on in this overview.
Key Insights and Tips
The most valuable parts of Anastasia’s story for 10almonds readers are, in our opinion, the solutions she discovered to her gut issues. You’ll have to watch her video to discover all of them, but here are some of our favorites:
- Reintroduce Whole Grains and Legumes: Despite the popularity of grain-free diets, Anastasia found significant improvements in her gut health by adding whole grains like quinoa, oats, and buckwheat back into her diet. These foods provide essential fibers that feed beneficial gut bacteria.
- Soaking and Fermenting Foods: To make grains and legumes more digestible, Anastasia recommends soaking them overnight. This is similar to the common technique people use on oats. She also includes fermented foods like sauerkraut, kimchi, and yogurt in her diet, which introduce beneficial bacteria to the gut.
- Resistant Starches: Foods like cooked and cooled rice, potatoes, and green bananas contain resistant starches that promote healthy gut bacteria. Anastasia emphasizes incorporating these into meals to support gut health.
- Mindful Eating: Anastasia found that taking time to chew food thoroughly and savor each bite helped improve her digestion. She avoids distractions like TV while eating and pays attention to the textures and flavors of her meals.
- Avoid Overly Restrictive Diets: Anastasia warns against overly restrictive diets like keto and strict SIBO diets that cut out all carbs and fiber. These can worsen gut health by starving beneficial bacteria.
That’s Only The Beginning
Anastasia’s video goes far beyond what we’ve covered in this short introduction; she provides a detailed look at the steps she took, from dietary changes to lifestyle adjustments, and offers tips that anyone can apply. Plus, she explains the science behind these changes, which, of course, we love.
Enjoy the video! (It would be remiss for us to not bring up our general intro to gut health, or our more specific article on the gut-brain connection)
Good luck on your gut-health journey!
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New research suggests intermittent fasting increases the risk of dying from heart disease. But the evidence is mixed
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Kaitlin Day, RMIT University and Sharayah Carter, RMIT University
Intermittent fasting has gained popularity in recent years as a dietary approach with potential health benefits. So you might have been surprised to see headlines last week suggesting the practice could increase a person’s risk of death from heart disease.
The news stories were based on recent research which found a link between time-restricted eating, a form of intermittent fasting, and an increased risk of death from cardiovascular disease, or heart disease.
So what can we make of these findings? And how do they measure up with what else we know about intermittent fasting and heart disease?
The study in question
The research was presented as a scientific poster at an American Heart Association conference last week. The full study hasn’t yet been published in a peer-reviewed journal.
The researchers used data from the National Health and Nutrition Examination Survey (NHANES), a long-running survey that collects information from a large number of people in the United States.
This type of research, known as observational research, involves analysing large groups of people to identify relationships between lifestyle factors and disease. The study covered a 15-year period.
It showed people who ate their meals within an eight-hour window faced a 91% increased risk of dying from heart disease compared to those spreading their meals over 12 to 16 hours. When we look more closely at the data, it suggests 7.5% of those who ate within eight hours died from heart disease during the study, compared to 3.6% of those who ate across 12 to 16 hours.
We don’t know if the authors controlled for other factors that can influence health, such as body weight, medication use or diet quality. It’s likely some of these questions will be answered once the full details of the study are published.
It’s also worth noting that participants may have eaten during a shorter window for a range of reasons – not necessarily because they were intentionally following a time-restricted diet. For example, they may have had a poor appetite due to illness, which could have also influenced the results.
Other research
Although this research may have a number of limitations, its findings aren’t entirely unique. They align with several other published studies using the NHANES data set.
For example, one study showed eating over a longer period of time reduced the risk of death from heart disease by 64% in people with heart failure.
Another study in people with diabetes showed those who ate more frequently had a lower risk of death from heart disease.
A recent study found an overnight fast shorter than ten hours and longer than 14 hours increased the risk dying from of heart disease. This suggests too short a fast could also be a problem.
But I thought intermittent fasting was healthy?
There are conflicting results about intermittent fasting in the scientific literature, partly due to the different types of intermittent fasting.
There’s time restricted eating, which limits eating to a period of time each day, and which the current study looks at. There are also different patterns of fast and feed days, such as the well-known 5:2 diet, where on fast days people generally consume about 25% of their energy needs, while on feed days there is no restriction on food intake.
Despite these different fasting patterns, systematic reviews of randomised controlled trials (RCTs) consistently demonstrate benefits for intermittent fasting in terms of weight loss and heart disease risk factors (for example, blood pressure and cholesterol levels).
RCTs indicate intermittent fasting yields comparable improvements in these areas to other dietary interventions, such as daily moderate energy restriction.
There are a variety of intermittent fasting diets. Fauxels/Pexels So why do we see such different results?
RCTs directly compare two conditions, such as intermittent fasting versus daily energy restriction, and control for a range of factors that could affect outcomes. So they offer insights into causal relationships we can’t get through observational studies alone.
However, they often focus on specific groups and short-term outcomes. On average, these studies follow participants for around 12 months, leaving long-term effects unknown.
While observational research provides valuable insights into population-level trends over longer periods, it relies on self-reporting and cannot demonstrate cause and effect.
Relying on people to accurately report their own eating habits is tricky, as they may have difficulty remembering what and when they ate. This is a long-standing issue in observational studies and makes relying only on these types of studies to help us understand the relationship between diet and disease challenging.
It’s likely the relationship between eating timing and health is more complex than simply eating more or less regularly. Our bodies are controlled by a group of internal clocks (our circadian rhythm), and when our behaviour doesn’t align with these clocks, such as when we eat at unusual times, our bodies can have trouble managing this.
So, is intermittent fasting safe?
There’s no simple answer to this question. RCTs have shown it appears a safe option for weight loss in the short term.
However, people in the NHANES dataset who eat within a limited period of the day appear to be at higher risk of dying from heart disease. Of course, many other factors could be causing them to eat in this way, and influence the results.
When faced with conflicting data, it’s generally agreed among scientists that RCTs provide a higher level of evidence. There are too many unknowns to accept the conclusions of an epidemiological study like this one without asking questions. Unsurprisingly, it has been subject to criticism.
That said, to gain a better understanding of the long-term safety of intermittent fasting, we need to be able follow up individuals in these RCTs over five or ten years.
In the meantime, if you’re interested in trying intermittent fasting, you should speak to a health professional first.
Kaitlin Day, Lecturer in Human Nutrition, RMIT University and Sharayah Carter, Lecturer Nutrition and Dietetics, RMIT University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Avocado vs Olives – Which is Healthier?
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Our Verdict
When comparing avocado to olives, we picked the avocado.
Why?
Both are certainly great! And when it comes to their respective oils, olive oil wins out as it retains many micronutrients that avocado oil loses. But, in their whole form, avocado beats olive:
In terms of macros, avocado has more protein, carbs, fiber, and (healthy) fats. Simply, it’s more nationally-dense than the already nutritionally-dense food that is olives.
When it comes to vitamins, olives are great but avocados really shine; avocado has more of vitamins B1, B2, B3, B5, B6, B7 B9, C, E, K, and choline, while olives boast only more vitamin A.
In the category of minerals, things are closer to even; avocado has more magnesium, manganese, phosphorus, potassium, and zinc, while olives have a lot more calcium, copper, iron, and selenium. Still, a marginal victory for avocado here.
In short, this is another case of one very healthy food looking bad by standing next to an even better one, so by all means enjoy both—if you’re going to pick one though, avocado is the more nutritionally dense.
Want to learn more?
You might like to read:
Avocado Oil vs Olive Oil – Which is Healthier? ← when made into oils, olive oil wins, but avocado oil is still a good option too
Take care!
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Hold Me Tight – by Dr. Sue Johnson
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A lot of relationship books are quite wishy-washy. This one isn’t.
This one is evidenced-based (and heavily referenced!), and yet at the same time as being deeply rooted in science, it doesn’t lose the human touch.
Dr. Johnson has spent her career as a clinical psychologist and researcher; she’s the primary developer of Emotionally Focused Therapy (EFT), which has demonstrated its effectiveness in over 35 years of peer-reviewed clinical research. In other words, it works.
EFT—and thus also this book—finds roots in Attachment Theory. As such, topics this book covers include:
- Recognizing and recovering from attachment injury
- How fights in a relationship come up, and how they can be avoided
- How lot of times relationships end, it’s not because of fights, but a loss of emotional connection
- Building a lifetime of love instead, falling in love again each day
This book lays the groundwork for ensuring a strong, secure, ongoing emotional bond, of the kind that makes/keeps a relationship joyful and fulfilling.
Dr. Johnson has been recognized in her field with a Lifetime Achievement Award, and the Order of Canada.
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