New Study shows Fasting causes Hair Loss

Physionic

Jan 8, 2025

Episode description

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0:00 - Introduction
0:39 - The Study
1:49 - Hair Loss?
4:55 - Caveats
5:30 - Main Points

References
[A] Chen H, Liu C, Cui S, et al. Intermittent fasting triggers interorgan communication to suppress hair follicle regeneration. Cell. Published online November 26, 2024. doi:10.1016/j.cell.2024.11.004

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#hairloss #hairlosscauses

Episode description

Mindsip insights from this episode:

Limit fasting to maintain hair regrowth rate

In the human trial, a weight-maintenance intermittent fasting diet (18-hour fast) resulted in a statistically significant reduction in the rate of hair regrowth.

#fasting

#hair-loss

Maintain hair density despite slower regrowth in fasting group

Despite a slower regrowth rate in the fasting group, the study found no difference in the actual density of hair shafts on the scalp.

#fasting

#hair-loss

Understand fasting effects: slower hair growth, not loss

The speaker's interpretation is that while fasting may cause hair to grow more slowly, it does not necessarily mean you will lose hair or reduce the number of hairs.

#fasting

#hair-loss

Acknowledge limitations of short human study on hair thickness

The human portion of the study was only about 11 days long, which limits the ability to draw conclusions about long-term effects on hair thickness.

#study

Understand fasting duration differences between mice and humans

An 18-hour fast in a mouse is metabolically equivalent to several days of fasting for a human, which is critical context for interpreting the animal data.