Does Cholesterol Affect Your Hair?

Recent research has found that cholesterol may promote the growth of hair follicle stem cells (HFSCs), allowing hair to grow more healthily.

The research team confirmed that when cholesterol was injected into the skin of laboratory mice, hair growth sped up.

This suggests a new treatment possibility through an approach different from existing hair loss treatments.

1. Cholesterol Promotes Hair Growth

The researchers confirmed that mice injected with cholesterol into the skin regenerated hair faster than ordinary mice.

Through tissue analysis, the activity of hair follicle stem cells increased, which accelerated hair growth.

This suggests that cholesterol may do more than simply provide nutrition; it may induce the proliferation of hair follicle stem cells.

2. The Relationship Between Sympathetic Nerve Activation and Hair Growth

What is interesting is that cholesterol activates the sympathetic nerves and thereby promotes the proliferation of hair follicle stem cells.

According to the results, as the sympathetic nerves were activated, hair follicle stem cells divided more rapidly, and as a result, hair grew more healthily.

In contrast, when the sympathetic nerves were blocked, the effect of cholesterol decreased sharply.

In other words, it is noteworthy that cholesterol is not just a nutrient, but influences hair growth through physiological actions related to the nervous system.

Source

Guo, M., Jiang, J., Zhang, A., Yu, W. and Huang, X., 2025. Cholesterol promotes hair growth through activating sympathetic nerves and enhancing the proliferation of hair follicle stem cells. Molecular Medicine, 31, p.86.

Can This Be Applied to Humans?

This study shows very interesting possibilities, but there are several important considerations.

First, this study was conducted in mice, and it has not been verified whether the same effect occurs in humans.

Second, in humans, elevated blood cholesterol levels can increase the risk of cardiovascular disease and metabolic disease.

According to existing studies, hypercholesterolemia has also been suggested to be possibly associated with hair loss.

In other words, it is difficult to conclude that more cholesterol will definitely make hair grow better.

The important point here is that the cholesterol used in the study was a local injection directly into the skin.

This was a method designed to concentrate the effect on the area where hair grows.

However, increasing blood cholesterol is a completely different matter.

If blood cholesterol were artificially increased, the health side effects would likely outweigh any benefit in preventing hair loss.

That is, even if a hair loss treatment using cholesterol proves effective, it must be approached locally.

Future Research Directions

Based on this study, the following additional research is needed.

1. Clinical trials in humans: It is necessary to confirm whether the results obtained from animal experiments are also effective in humans.

2. Review of long-term effects and side effects: It is necessary to evaluate whether cholesterol injections into the skin are safe over the long term.

3. Development of alternative treatments: Instead of directly injecting cholesterol, it is necessary to study safer treatments that can produce similar effects.

This study showed the possibility that cholesterol may have a positive effect on hair growth.

However, additional research is needed before it can be applied to humans, and raising blood cholesterol may instead be harmful to health.

Therefore, the use of cholesterol as a treatment for hair loss must be approached with greater caution.

We hope that future research will lead to the development of safer and more effective hair loss treatments.

It is now time for hairhair, this was Kim Jino.

May new hair be born.

References

Guo, M., Jiang, J., Zhang, A., Yu, W. and Huang, X., 2025. Cholesterol promotes hair growth through activating sympathetic nerves and enhancing the proliferation of hair follicle stem cells. Molecular Medicine, 31, p.86.

[In accordance with Article 56, Paragraph 1 of the Medical Service Act, this post has been written directly by a board-certified plastic surgeon for informational purposes. Hair transplant surgery and treatment may have side effects, and please make a careful decision after consulting with a specialist.]