PRP hair results: what to assess over time

PRP hair results should be assessed over months, not from the appearance of the scalp immediately after injections. Reduced shedding and a visible change in density are different outcomes, and neither is guaranteed.

The AAD notes that reduced shedding may be noticed within the first few months. It describes monthly visits for three months followed by maintenance every 3–6 months as a common pattern, not a required course for everyone. Your diagnosis and response guide the plan. AAD hair-loss treatment guidance.

Start with a diagnosis

Hair loss has several causes. A treatment plan for gradual patterned thinning may not suit sudden shedding, an inflamed scalp or an area where follicles have been destroyed. We assess the pattern and history before discussing PRP.

Tell us when the change began, whether shedding has changed recently and what you have already tried. We use this history to set a relevant starting point. A photograph without the diagnosis can make two very different conditions look similar.

Record change consistently

Photograph the same parting or hairline in similar light, with a similar hairstyle and camera position. Wet hair, a different parting or styling fibres can change the apparent coverage without a change in growth.

At review, we discuss your own observations alongside the examination. Less shedding may be encouraging, but it is not the same as proving a measured density increase. The approved examples on our PRP hair page are individual outcomes, not a forecast for you.

What does the evidence show?

Studies suggest possible benefit for androgenetic alopecia, but results are mixed. One small controlled trial found greater density on the PRP-treated side. Another found improvement on both PRP and placebo sides without a significant difference between them. Positive half-head trial; split-scalp trial.

This is why we do not promise a fixed percentage gain or describe PRP as a way to create new follicles. A favourable study is not a guarantee that your cause of hair loss will respond.

When do we review the course?

We agree review points rather than asking you to judge every day's shedding. The AAD describes repeat treatment and maintenance as part of common PRP care, but the plan still depends on response and suitability.

If there is little useful change, we review the diagnosis and options instead of assuming that more injections are the only next step.