Question 1

Does intermittent fasting actually work for weight loss?

Accepted Answer

It can, but mainly because it helps some people eat fewer total calories, not because of a special metabolic effect. A 2020 JAMA trial found an eight-hour eating window produced weight loss no greater than ordinary calorie cutting, and some of the loss was muscle rather than fat.

Question 2

What is autophagy and does fasting trigger it in humans?

Accepted Answer

Autophagy is a cellular recycling process, discovered in yeast by Nobel laureate Yoshinori Ohsumi, in which cells break down and reuse their own damaged parts. Fasting boosts it, but most evidence comes from yeast and mice, so the timing and scale of the effect in humans remains unclear.

Question 3

Is intermittent fasting safe for everyone?

Accepted Answer

No. It can be risky for people with diabetes, especially those on insulin or glucose-lowering medication, because long gaps without food can cause dangerous blood sugar lows, and it can trigger harmful cycles in people with a history of disordered eating. Consult a doctor first.

intermittent-fasting

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