Many men and women start noticing thinner-looking, weaker-looking hair before they understand what is happening at the scalp level. Melatonin is now being studied for its role in scalp biology, hair-cycle support, and healthier-looking hair routines.

Melatonin is widely known as the body’s “sleep hormone,” but research has also shown that it plays a role in skin and hair biology. Human hair follicles can produce melatonin locally, and melatonin receptors are present in skin-related cells, which is one reason scientists have studied it for scalp and hair support. 

Why does that matter for hair?

Hair grows in cycles. Scientists have investigated melatonin because it appears to be involved in hair-cycle regulation and in helping protect cells from oxidative stress. In simple terms, that means melatonin is being studied not just for sleep, but also for supporting a healthier environment around the hair follicle. 

What research suggests

A 2023 review of human studies reported that most of the identified studies on topical melatonin showed positive outcomes in people with androgenetic alopecia, including improvements in scalp hair growth, density, and sometimes hair shaft thickness. 

Earlier clinical work also found that topical melatonin increased the proportion of hairs in the anagen, or active growth, phase in some study groups. 

A 2012 review of clinical studies concluded that topical melatonin showed positive effects in men and women with androgenetic alopecia and was generally well tolerated. 

For men and women looking for a melatonin-powered shampoo routine, Kenogen Men and Kenogen Women are designed to support stronger, fuller-looking hair with consistent use.

Why people are paying attention to melatonin in hair care

Thinning hair is rarely caused by just one factor. Stress, age, scalp condition, genetics, hormones, and everyday hair care habits can all play a role. That is why many people look for products that support the scalp while fitting easily into a daily routine.

Melatonin has attracted attention because it is associated with:

• support for the hair growth cycle

• antioxidant protection around the follicle

• scalp-friendly topical use studied in hair-loss settings 

What this means in real life

No shampoo is magic, and no single ingredient is the whole answer. But melatonin is one of the more interesting ingredients being discussed in modern hair care because it has been studied specifically in relation to thinning hair and scalp support. 

For people noticing weaker, finer, or thinner-looking hair, choosing a shampoo with melatonin may be a smart part of a broader routine focused on scalp care, consistency, and healthier-looking hair over time.

Where Kenogen fits in

Kenogen Men is designed for men who want daily care for weakening hair in a practical, easy-to-use format. The benefit is not about making hair care more complicated. It is about using a formula built around ingredients that are relevant to scalp and hair support, including melatonin.

If your goal is stronger-looking, healthier-looking hair, starting with the scalp is a sensible place to begin.

Looking for a premium Italian shampoo with melatonin? Explore Kenogen Men and Kenogen Women — dermatologically tested formulas designed to support stronger, fuller-looking hair over time.

Explore:

Kenogen Men Melatonin Shampoo for Thinning Hair

Kenogen Women Melatonin Shampoo for Thinning Hair