Scalp Massage and Hair Thickness: Koyama 2016 Research Summary
This is a plain-language summary of the original published research. We do not add conclusions or opinions of our own. This is not medical advice — consult a certified healthcare practitioner before making any decision.
Original research published in ePlasty, 2016
Scalp Massage and Hair Thickness: Koyama 2016 Research Summary
Study conclusion
This small pilot study of 9 healthy men (without pattern hair loss) found that 4 minutes of standardised scalp massage per day for 24 weeks resulted in increased hair shaft thickness — but not hair count. The study was conducted in men without hair loss, making it unclear whether results apply to people with androgenetic alopecia.
Strength of evidence
Who it applies to
Who was studied
9 healthy men without androgenetic alopecia. All participants received the scalp massage intervention — no control or comparison group. 24-week treatment period.
Who was NOT studied
People with pattern hair loss (androgenetic alopecia). Women. Anyone outside this very small group of 9 healthy men.
What to look for when shopping
Scalp massage requires no product — it is a manual technique. 4 minutes per day was the protocol used in this study. However, this study was conducted in men without hair loss. Its relevance to people with androgenetic alopecia is unknown.
What research cannot help you decide
Whether scalp massage reduces hair loss or increases hair count in people with pattern hair loss. The study did not test this. Whether any particular technique, pressure, or frequency is optimal.
Key findings
- 4 minutes of standardised scalp massage per day for 24 weeks increased hair shaft thickness in 9 healthy men
- Hair count did not significantly increase — only thickness was affected
- The study was conducted in men without pattern hair loss — results may not apply to people with androgenetic alopecia
- There was no control group — all 9 men received the same treatment
- No randomised controlled trial of scalp massage for pattern hair loss has been published
What this study does not show
- 1.Whether scalp massage reduces pattern hair loss. The study was conducted in men without hair loss.
- 2.Whether scalp massage would increase hair count in people with androgenetic alopecia.
- 3.How scalp massage compares to minoxidil, finasteride, or any other treatment.
- 4.Whether results in 9 healthy men would apply to a larger or more diverse population.
Limitations
- 1.Only 9 participants — an extremely small pilot study.
- 2.Conducted in healthy men without pattern hair loss. Findings cannot be directly applied to people with androgenetic alopecia.
- 3.No control group — all participants received the same treatment. Results cannot be attributed specifically to the massage.
- 4.No randomised controlled trial of scalp massage for pattern hair loss exists.
- 5.The massage device used may not produce the same result as manual massage.
Used in these articles
Links added as fact-checks and articles citing this study are published.