Does PRP Work for Hair Loss? Evidence and Expectations

Platelet-rich plasma (PRP) may improve hair density for some people with pattern hair loss. Results vary, and a change measured at one point on the scalp may be less obvious in a photograph or in the mirror. Establishing why your hair is thinning is the first step in deciding whether this research applies to you.

What did the clinical trials find?

A randomised study in women with pattern hair loss reported improved average hair density after PRP compared with placebo. A separate small crossover study in men found a density improvement in one treatment sequence at a secondary endpoint. The studies used different designs. Together, they give grounds to discuss possible benefit while leaving uncertainty about the size and durability of an individual response.

Who do those results apply to?

Evidence in pattern hair loss cannot be assumed to apply to every cause of shedding. If hair is coming away in discrete patches, the scalp is inflamed or the change followed illness, seek an assessment. The most useful first option may be investigation or treatment for the underlying condition.

How can you tell whether it is working?

Agree on the outcome that matters to you, such as coverage of a particular parting. Record baseline photographs with consistent lighting, hair length and styling. Ask whether the same area can be measured at follow-up and how other treatments or changes in your routine might affect the comparison.

What if there is little change?

Agree on a review point before paying for further appointments. Ask whether the change is visible or measurable, what additional sessions are expected to achieve and which alternatives suit your diagnosis. An aftercare and review plan should also address symptoms or concerns between visits.