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Yes, short fasts can shift timing for some, but energy deficits more often delay or disrupt menstrual bleeding.

Yes, fasting can disrupt sleep in some people by boosting wakefulness signals, shifting circadian timing, and raising nighttime hunger.

No, fasting typically raises uric acid in the short term; only steady weight loss may lower uric acid over time.

Yes, fasting can reduce elevated liver enzymes when it leads to steady weight loss and better metabolic control.

Yes, prolonged calorie deficits from fasting can reduce estrogen, while short-term time-restricted plans often show little change.

Yes, fasting patterns can raise eating-disorder risk, especially in people with past disordered eating or high weight concerns.

Yes, fasting can trigger or worsen eating-disorder risk in vulnerable people, especially with rigid rules or past body-image struggles.

No, strict food restriction doesn’t clear SIBO; it may calm symptoms, but it doesn’t remove bacterial overgrowth.

No, fasting doesn’t kill pinworms; medicines like mebendazole, pyrantel pamoate, or albendazole plus strict hygiene are the proven fix.

No, fasting by itself doesn’t kill cancer tumors; early research tests fasting or fasting-mimicking diets only as add-ons to standard treatment.