A member asked:

Does fasting delay periods?

A doctor has provided 1 answer
Dr. Guy DaSilva answered

Specializes in Endocrinology

It sure can: One way that fasting effects the periods is by reducing thyroid function. As part of a work-up for irregular periods, i will often look at thyroid function as a cause. Hypothyroidism is common to irregular periods. When a person fasts, the thyroid goes into conserve mode. It slows down metabolism as to not "eat you up" alive. During a fast, the thyroid- believes there is a famine- will lower.

Answered 11/17/2018

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