Questions tagged [fasting]

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Why is it necessary to fast before a procedure involving anesthesia?

Before dental or surgical procedures involving anesthesia, there is a common instruction for patients to avoid eating or drinking for some time before their scheduled procedure. Is this because ...
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Can an adequate calorie intake help prevent hypothermia and frostbite?

The research paper "The effects of fasting on core temperature ... in rats" explains that a discontinued calorie intake decreases the core body temperature of rats. Question is if an adequate ...
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Does intermittent fasting increase or decrease the odds of getting gallstones, assuming a healthy diet?

I have read some webpages mentioning that intermittent fasting increases the odds of getting gallstones. E.g., https://www.hopkinsmedicine.org/health/conditions-and-diseases/gallstones: As the body ...
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Has intermittent fasting without calorie reduction/increase any deleterious side effects, aside perhaps on sleep, cortisol, and gallstones?

Has intermittent fasting without calorie reduction/increase any deleterious side effects, aside perhaps on sleep, cortisol and gallstones? I have read a fair amount of articles on intermittent ...
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What is the effect of intermittent fasting on sleep, if any?

What is the effect of intermittent fasting on sleep, if any? The 2018 review {1} was quite inconclusive, except for REM sleep in the case of diurnal intermittent fasting: The impact of diurnal ...
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Does intermittent fasting (without calorie reduction/increase) cause an increase in cortisol levels?

I read on https://amp.businessinsider.com/signs-intermittent-fasting-unsafe-unhealthy-2019-7: Rumsey said depriving yourself of food for an extended period of time can increase levels of cortisol, ...
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Does intermittent fasting induce autophagic cell death?

https://www.cancertherapyadvisor.com/home/tools/fact-sheets/intermittent-fasting-and-cancer/ In vitro and in vivo animal studies suggest that PF inactivates pro-proliferative pathways, while ...
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classical conditioning of glucose levels?

I've edited this so it hopefully meets the guidelines of this forum. I'd like to know if there are any studies that demonstrate an anticipatory effect similar to classical conditioning, increasing ...
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Interval fasting - is it healthy?

According to Hottenrott 2017 (a teaching sport medicine professor), interval fasting is a good for health and losing weight, side effect people feel well and clear. What are risks though, and is it ...
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218 views

Intermittent Fasting: Why is exactly *zero* calories special?

Is there something special about exactly 0 calories vs 1 calorie? When researching Intermittent Fasting, the "magic" seems to come from the body's response to insulin dropping and its response to ...
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119 views

Is there evidence that humans should fast intermittently daily for 16 hours because it is healthy in general?

There is a big fasting boom on the internet, but it is hard to sift through the claims of fitness and health bloggers and the real evidence. I have spent hours reading studies on fasting - it is ...
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Hydrating before a fast day

There are a few days a year in which certain religions fast. I was wondering if there's an evidence based approach for absorbing a lot of water before to help keep oneself hydrated. I was reading ...
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Does fasting inhibit healing?

Fasting stresses the body. Whereas the body may normally rely on fats, proteins and carbohydrates from food, during a fast extending beyond a few days the body is forced to consume fats in place of ...
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Should I continue fasting if I have diarrhea?

Wikipedia says that Diarrhea can result in dehydration. Some religions demand that one fast on a regular basis. What are the possible consequences of fasting for most of the day if one has diarrhoea?...
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Low Insulin but Normal Blood sugar

What does is mean when fasting Insulin Levels are Very Low (0.7 uU/ml) but Fasting Blood sugar levels are normal 4.2 mmol KD.
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Does fasting improve your immune system even when you are already having some infection?

I am one of the self-motivated activists who run some groups to answer various misconceptions about science and try to fight against ignorance, pseudo-sciences and blind faiths. I was recently asked ...
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158 views

Are water only fasts healthy? Can they cause headaches or other medical problems?

I have been using the below fasting protocol that I'd like to use for intermittent fasting - Fast duration - Sunday night (10-11pm) to Tuesday morning (4:30am) Consumed during fast - Only water (2-...
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Can fasting destroy our adaptive immune system?

Fasting for 72 hours been shown to lead to white blood cell regeneration (1). The cells basically die after several days, and are created again from stem cells upon feeding. This article describes how ...
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How to mitigate thirst

Ramadan is starting soon, and I wonder what would be the best ways to mitigate thirst during a long period (in this case from dawn till dusk). EDIT: I was wondering what could be done not to suffer ...
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870 views

Elevated glucose right after waking up

After a recent blood test that showed elevated fasting glucose (110mg/dl) and elevated triglycerides (~335mg/Dl), I got myself an Accu-check glucose tester and started regular testing to try to figure ...
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Is it healthy to fast for a full day once a week? [closed]

I heard that fasting once a week gives some rest to our digestive system and allows it to refresh. I tried this twice, but it gave me a headache and made me feel uneasy. Is it good for health? Will ...
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Pre diabetic after fasting blood work?

So I have been feeling very lethargic the past year and went in to get some blood work. I fasted for 12 hours prior to test, with the exception of mint that I had that morning hour before test that ...
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Does eating a sugary multivitamin bring you into the fed state for intermittent fasting?

Intermittent Fasting Overview I'm doing intermittent fasting. This diet restricts eating to narrow time window to increase fat burn through an increase in the release of growth hormone. As suggested ...