David Sinclair, a Harvard genetics professor who only sleeps 6 hours a night and doesn’t exercise every day swears 3 habits helped reverse his biological age by a decade. Excellent article that is well worth the read...I believe that I would add daily exercise (your choice) because muscle is the organ of longevity...and I feel the older he gets he would want to add this to his regimen...otherwise I concur from experience his foundational practices.
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What are you talking about? Skipping breakfast causes stress? You think your body goes wacky if it doesn't eat in 12-16 hours? Wow.
It is no wonder we are in the mess we are in with so regurgitating nonsense that confirms their bias.
The following is NOT based on any factual evidence. "Skipping breakfast causes cortisol and adrenaline to rise as calories are restricted. Higher stress levels will convert fats into glucose as its the body's preferred fuel source. Higher stress levels cause the body to down regulate hormones, thyroid and basic functions as it perceives a scarcity. It will even try to hold onto fat. Oftentimes these people will have really low testosterone levels."
I used to buy in to what your espousing. So I get it. But the body likes being satiated. Also what i have stated are facts. Glucose is the preferred fuel source for cells. If only fat is available the body will use cortisol to convert into glucose. I used to skip breakfast and feel fine. But now I switched into high calorie diet and it's more awesome. Avoid processed foods, seed oils, even seeds. Go for fruit, fats and meat. That's my take.
Ketones get made from fat if glucose is too low, cortisol is a stress hormone that causes inflammation and other issues.
Which is my understanding that stress hormones are used to convert fat into ketones. Long term keto is bad news.
You can have high cortisol in any diet, it's caused more by environmental factors and stress in general and leads to issues like poor sleep which in turn causes the body to store more fat instead of burning it. People with high cortisol levels tend to have higher percentages of visceral fat which it itself causes more inflammation and you're on the road to diabetes and heart disease and such.
We don't know the full effects of long-term (multiple years) keto which is why it's something meant to be done in phases not become a permanent lifestyle. The goal really should be to develop metabolic flexibility so that you can switch between carbs and keto diets seamlessly (what's referred to as fat adaptation.)
Why would the body use cortisol to convert into glucose when the body is so adept at burning fat as an energy source as is successfully proven in the keto diet?