08/23/2021
Dietitians talk about what we eat, but very few think about WHEN we eat. But, ignoring the “when” of nutrition could be a huge mistake!
In the morning, our digestive system starts ramping up production of digestive juices, in preparation for a day of eating. In addition, genes that impact how we absorb nutrients and burn calories get turned on and off at different times of the day, creating a window of time when it’s healthiest to eat. However, at nighttime, when we’re meant to be sleeping, our digestive system and our liver aren’t primed to digest, absorb and burn calories from our food. Eating too much, too late, at night has been shown to cause problems with blood sugar regulation. And I’ve talked over and over about how important stable blood sugar is to our brain!
An amazing study in mice shows how just important meal timing can be. Researchers gave two groups of mice identical, “unhealthy” diets high in sugar and fats. However, one group of mice received their food over a 24-hour period, so they were able to eat and snack whenever they wanted. The other group was only given their food within an 8-hour window. Despite eating the same number of calories and same diet, those “time-restricted” mice showed none of the long-term negative health effects that would be expected from such an unhealthy diet, and shockingly, didn’t become obese. On the other hand, the other group of mice developed all kinds of illnesses – heart disease, Type 2 diabetes and fatty liver disease – and, as expected, became obese! Incredibly, these groups of mice both ate the same number of calories and the same unhealthy diet.
What does this mean for us? Well, Time-Restricted Eating has become a more and more popular dietary concept, with some people only eating within an 8-, or even 6-hour window. That may be extreme for many of us, but even just reducing our “eating window” to 10 or 12 hours could be a great way to optimize our health, both physical and mental. Aligning our meals, our bedtimes and our exercise with our internal clock is showing huge promise as the next frontier in nutrition, and in mental health. Got questions on this? Send me a DM, or comment below!