This method of dietary restriction causes an increase in oxidative stress which affects follicular stem cells and hinders hair regeneration.
Eat less to live longer… but with less hair? This is the difficult choice that could be faced by all those who wish to improve their health by following intermittent fasting. Several studies, particularly in animal models, have shown that this approach of dietary restriction, where we eat only for a few hours of the day, could be beneficial. She would protect the heartand could reduce the risk of metabolic diseases.
However, a new study has just shown that intermittent fasting could also have less desirable effects… particularly for the hair. Researchers from Zheijang University in China have demonstrated in mice and humans that this dietary restriction affects follicular stem cells, considerably slowing down the hair regrowth. These results were published on December 13, 2024 in the journal Cell.
Hair regrowth is disrupted due to dietary restriction
To find out if intermittent fasting could have any impact on hair regrowth, the researchers shaved mice and then fed them two types of food restriction: intermittent fasting, where the mice had access to food only for eight hours, having to fast for the remaining 16 hours; a total fast every other day; and a control group with a normal diet (at will). Thirty days after being shaved, the normally fed mice had already regained most of their hair. But this was not the case for the other two groups. Worse: after three months, their hair had still not grown back completely.
To find out if this effect also occurs in humans, the authors analyzed the impact of intermittent fasting in 49 healthy adults, who had to fast for 18 hours each day, for 10 days. In their case, hair regrowth slowed down by approx.[…]
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