fasting and insomnia

dr. jason fung is one of the world’s leading experts on fasting for weight loss or diabetes reversal. on fasting days i have trouble getting to sleep and getting enough sleep. dr. jason fung: this is a common problem. the increase in nor-adrenalin and cortisol can disturb sleep. this can sometimes mean cutting sleep time down to 3 hours! my cortisol level is 913, but it should be between 150-660. i’ve read that hunger increases cortisol. dr. jason fung: yes, fasting may increase cortisol, which is one of the counter regulatory hormones that is meant to increase glucose in the blood during fasting. whether it is safe depends upon your medical history, and you would need to discuss with your doctor. would this be considered to be a form of fasting or simple calorie restriction? as a 64 year old woman 5’1″ (155 cm) and weighing 179 lbs (81 kg), i am interested in trying dr moseley’s suggestion (or the alternate day version of it) as i lose weight very slowly using just lchf and 16:8 fasting. when i attempted to do a water fast for several days you suggested that i stop as i started to feel very unwell.

it is a good temporary fix, but not one i would recommend. i use intermittent fasting instead – some days will have zero calories and other days will be 2000. long term caloric reduction is doomed to fail, as the body adjusts to the lowered caloric intake. i had a night where i had 3 hours sleep 10pm to 1am this week. i have had other occasions of 3 hours sleep and felt fatigue most of the day. it’s good to know that it’s okay to sleep less as if i wake up after 4 to 5 hours i feel great. i am a 53 year old female. when i stopped intermittent fasting the hot flashes stopped. i do 16:8 hours if. also i have plateaued always between 80kg and 81kg. i do my best to eat plant based foods and eat well. hello valerie, i am not sure if dr. fung will see this comment.

intermittent fasting and insomnia while intermittent fasting appears to improve sleep quality, it could also lead to sleep issues depending on why intermittent fasting can cause insomnia in the long run, most people find that intermittent fasting helps them sleep better, if anything. it has been postulated that tre diets, which involve fasting for 2–5 h before bedtime, may lower rates of insomnia. specifically, abstaining, .

fasting can also cause a dip in the sleep hormone melatonin which plays an important role in your sleep patterns. limiting your calories may also trigger a spike in cortisol, the hormone associated with stress. cortisol is also responsible for regulating blood sugar levels, metabolism, and inflammation. however, on the other hand, prolonged periods of fasting with a very limited caloric intake have been shown to cause a substantial rise in the hormone cortisol. “on the bright side, sleep quality and duration don’t get worse with fasting before bedtime,” varady says. but ultimately, “more studies with like most negative effects of fasting, insomnia is worse during the first few days and improves as you continue for several days. however, for some people,, .

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