A recent study highlights a potential drawback of intermittent fasting, revealing it may slow hair growth in both humans and animals.
Intermittent fasting, a dietary practice gaining popularity for its potential health benefits such as weight loss and reduced inflammation, is now under scrutiny due to its possible effect on hair growth. A study published in the journal ‘Cell’ examined the impact of intermittent fasting, using both human and animal models, indicating a slowdown in hair regrowth.
The research began with an experiment on mice, which were subjected to two intermittent fasting patterns: 16:8 (eight hours of eating, 16 hours fasting) and alternate-day fasting. The results were revealing. After 90 days, mice on these diets had only partially regrown their hair, while those with unlimited food access had regrown most of their hair in 30 days. Researchers attributed this phenomenon to the ability of hair follicle stem cells (HFSCs) to withstand oxidative stress. The stress occurs when the body shifts its energy source from glucose to fat during fasting periods.
In a related study involving humans, 49 healthy young adults participated, where their fasting regimen was 18 hours per day. Results showed an 18% decrease in hair growth speed compared to individuals on a regular diet. Dr. Bing Zang, an expert affiliated with Westlake University in China, noted the heterogeneity among human subjects which could account for varying effects. While mice have high metabolic rates affecting HFSCs more severely, humans showed a more moderate response, with some HFSCs surviving.
Despite the findings, researchers do not wish to deter individuals from intermittent fasting, highlighting its potential benefits. Dr. Zang emphasized awareness of possible side effects and expressed interest in further investigating how fasting affects tissue regeneration and wound healing, as well as identifying metabolites that might aid HFSC survival during fasting.
Medical professionals have weighed in on these findings. Dr. Jennifer Cheng from Hackensack Meridian Jersey Shore University Medical Center remarked on the significance of the study’s results in mice, suggesting a need for further human studies to validate the applicability of these findings. Dr. Hans J. Schmidt, of Hackensack University Medical Center, noted the common occurrence of hair loss during rapid weight loss and elaborated on the disruption of the hair growth cycle, implicating hormonal and metabolic changes.
For those concerned about hair loss while fasting, nutrition plays a crucial role. Monique Richard, a registered dietitian nutritionist, stresses the importance of acquiring essential nutrients. These include proteins, vitamins A, C, D, E, B vitamins, and minerals like iron, selenium, and zinc. Incorporating nutrient-rich foods such as leafy greens, eggs, fish, and nuts can prove beneficial. Richard advises against relying heavily on supplements, which may lead to nutrient imbalances.
While intermittent fasting offers health advantages, it is essential to consider potential side effects such as slower hair growth. As research continues, individuals are advised to consult healthcare professionals to tailor dietary practices to their health needs. Balancing fasting with adequate nutrition may mitigate unwanted effects, ensuring overall wellness.
Source: Medicalnewstoday
