According to the International Food Information Council, roughly 12 percent of Americans practice some form of intermittent fasting. This hugely popular diet movement cycles between long fasting periods followed by eating periods. The goal is weight loss. But, while weight management might be an outcome of intermittent fasting, researchers have found a not-so-nice side effect: hair loss.
The Impact of Intermittent Fasting on Hair Regrowth
A new study published in Cell found an association between stunted hair regeneration and intermittent fasting in mice populations. Led by stem cell biologist Bing Zhang from Westlake University in China, researchers found that these intermittent fasting schedules had an impact on hair regrowth.
Results of the Study
According to the study, mice who stuck to the intermittent fasting schedule only had partial hair regrowth after 90 days. The control group had almost total regrowth by 30 days.
Why the Difference?
The difference is striking. Researchers posit that fasting may impact oxidative stress and prompt hormonal changes that affect hair stem cells.
What Happens to Hair Stem Cells During Fasting?
“During fasting, adipose tissue starts to release free fatty acids, and these fatty acids enter the HFSCs that were recently activated, but these stem cells don’t have the right machinery to use them,” Zhang explains in a media release.
The Impact on Humans
Mice have much higher metabolisms than we do, so it’s likely that the impact on humans is not as severe.
Clinical Trial Results
In a small clinical trial on humans, the more extreme 18-hour fasting schedule inhibited hair growth by 18 percent. Zhang notes that these results are not representative.
Conclusion
“We don’t want to scare people away from practicing intermittent fasting because it is associated with a lot of beneficial effects—it’s just important to be aware that it might have some unintended effects,” Zhang emphasizes.
FAQs
Q: Is intermittent fasting still beneficial despite the potential hair loss side effect?
A: Yes, intermittent fasting has been associated with various health benefits, including weight loss, improved blood sugar control, and reduced risk of chronic diseases. However, it’s essential to be aware of potential unintended effects like hair loss.
Q: Can I still try intermittent fasting if I’m concerned about hair loss?
A: Yes, but it’s crucial to monitor your hair health and consult with a healthcare professional if you experience any significant changes. You may also consider adjusting your fasting schedule or incorporating supplements to support hair growth.
Q: Are there any ways to mitigate the negative impact on hair growth?
A: Researchers suggest that oxidative stress and hormonal changes may contribute to hair loss during fasting. Taking antioxidant supplements or ensuring adequate vitamin and mineral intake might help minimize the negative effects on hair growth.
Q: How common is hair loss due to intermittent fasting?
A: The study found that mice experienced stunted hair regeneration, but the extent to which humans are affected is still unclear. Further research is needed to determine the prevalence and severity of hair loss due to intermittent fasting in humans.