14/07/2020
Fasting And Circadian Rhythm? ⠀
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Many hormones fluctuate based on circadian rhythms and time of the day. A lot of the repair hormones as well as autophagy activation, and growth hormone, melatonin are all elevated during the night. Most of the autophagy benefits occur in conjunction with the release of melatonin as well as growth hormone which happens in deep sleep. That happens in the earlier parts of the night. If you are eating a large dinner then you are interfering with the process because your body would have to digest food vs repairing itself. Going to bed in a semi fasted state would lead to increased autophagy and increased growth hormone. This is because you’re fasting and your body would be primed to repair itself. ⠀
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When it comes to actual research that compares early time-restricted eating with late time-restricted eating, there is not a significant difference as long as you are still fasting and eating the food within a certain time frame. The main benefits come from the aspect of the fasting window. There should be some sort of fasting in your day to get these benefits. BUT eating right before bed isn’t a good idea because it is going to decrease your sleep quality and make you feel uncomfortable.⠀
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Optimally you want to stop eating 4-5 hours before bed to fully digest this food you ate and go into rest mode. In the morning, wait to eat breakfast. You have elevated cortisol and you are more prone to storing the food as fat if you eat in a high cortisol environment. Cortisol drops after 9am, so waiting a few hours after waking up is a good rule of thumb to keep in mind. ⠀
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If I eat late, I notice a substantial difference in my sleep quality. For example: If I have a social event and I eat at 7:30 and I am in bed by 10 or 10:30 I feel horrible. I am tossing and turning, my gut feels like something is in it, I can’t get to sleep, and then I wake up feeling very crappy because I haven't had good sleep. This is normal for most people because of their baseline. But since I have been doing this time-restricted eating for a while now I can feel the difference.