Medically reviewed by the medical team at The Wellness. Last reviewed November 2026.
Most people start with 3 to 5 sessions, a month apart. You usually notice less shedding first, then thicker hair at around 3 to 6 months. After that, a top-up every 3 to 6 months keeps the result, because pattern hair loss does not stop on its own. At The Online GP by The Wellness, a doctor sets the number of sessions at your first visit and adjusts it as you go.
Key points
Most trials of hair PRP used 3 to 5 sessions, about a month apart.
Results were usually measured at 3 and 6 months, because hair grows slowly.
Shedding tends to settle before you see thicker hair.
Without top-ups, the benefit fades over time.
PRP alongside a medicine such as minoxidil may do better than PRP alone.
How many sessions will I need?
Most people start with 3 to 5. A 2024 review of randomised trials found most studies used monthly sessions in courses of 3 to 5, and measured results over 3 to 6 months.
We set your number at the first consultation, based on how much thinning you have, and change it once we see how your hair responds.
When will I notice a difference?
Shedding usually settles first. Thicker-looking hair comes later, at around 3 to 6 months. Hair grows about a centimetre a month, so new growth needs time before it shows.
It is hard to judge in the mirror, because you see your hair every day. We take photographs in the same light at each visit, so you can compare properly.
Ask a doctor on WhatsApp what to expect.
How long do the results last?
Months, not forever. Pattern hair loss keeps going in the background, so most people have a top-up every 3 to 6 months once the first course is done. The British Association of Dermatologists notes that hair loss treatments only work while you keep them up, and that research on PRP is still limited.
Results last longest when PRP is part of a wider plan, with a medicine where it suits you and any other cause, such as low iron, treated.
Can I get more out of it?
Start early, keep to the schedule, and think about a medicine alongside it. Our guide to PRP, minoxidil and finasteride explains how they work together.
Ask a doctor on WhatsApp about a hair plan.
What does a course look like?
Your course is planned at the first visit and checked as it goes.
Message us on WhatsApp to book your first consultation.
The doctor examines your scalp, takes photographs and agrees the course with you.
You come in about once a month for each session.
We compare your photographs during the course and change the plan if needed.
Once the course is done, we agree when your top-ups should be.
Want to know what your course would look like?
Send us photos of your scalp and tell us how long it has been thinning. A doctor will give you a realistic idea of how many sessions you would need. The cost of your plan is confirmed before anything is booked.
Frequently asked questions
How far apart are PRP sessions?
The first course is usually a month apart. Top-ups are usually every 3 to 6 months.
Is one PRP session enough?
Rarely. The studies that showed a benefit used a course of several sessions.
Can I wash my hair after PRP?
Most people are advised to wait until the next day. The doctor gives you aftercare advice on the day.
Sources
An Bras Dermatol, Autologous platelet-rich plasma and hair density in androgenetic alopecia, systematic review and meta-analysis, 2024
British Association of Dermatologists, Male pattern hair loss
<script type="application/ld+json">{"@context":"https://schema.org","@graph":[{"@type":"MedicalWebPage","@id":"https://theonlinegp.com/blog/how-many-prp-sessions-hair#webpage","url":"https://theonlinegp.com/blog/how-many-prp-sessions-hair","name":"How many PRP sessions do you need for hair, and how long do results last?","description":"How many PRP sessions hair loss usually needs, how far apart they are, when results show, and how long they last.","inLanguage":"en-GB","lastReviewed":"2026-11-12","datePublished":"2026-11-12","dateModified":"2026-11-12","about":[{"@type":"MedicalCondition","name":"Androgenetic alopecia"}],"audience":{"@type":"Patient"},"reviewedBy":{"@type":"Organization","name":"The Wellness medical team","url":"https://thewellnesslondon.com"},"publisher":{"@id":"https://theonlinegp.com/#clinic"}},{"@type":"MedicalClinic","@id":"https://theonlinegp.com/#clinic","name":"The Online GP by The Wellness","url":"https://theonlinegp.com","address":{"@type":"PostalAddress","streetAddress":"10 Portman Square","addressLocality":"London","postalCode":"W1H 6AZ","addressCountry":"GB"},"parentOrganization":{"@type":"Organization","name":"The Wellness","url":"https://thewellnesslondon.com"}},{"@type":"Service","name":"Doctor-led PRP","provider":{"@id":"https://theonlinegp.com/#clinic"},"areaServed":"London"},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How far apart are PRP sessions?","acceptedAnswer":{"@type":"Answer","text":"The first course is usually a month apart. Top-ups are usually every 3 to 6 months."}},{"@type":"Question","name":"Is one PRP session enough?","acceptedAnswer":{"@type":"Answer","text":"Rarely. The studies that showed a benefit used a course of several sessions."}},{"@type":"Question","name":"Can I wash my hair after PRP?","acceptedAnswer":{"@type":"Answer","text":"Most people are advised to wait until the next day. The doctor gives you aftercare advice on the day."}},{"@type":"Question","name":"What happens if I stop PRP?","acceptedAnswer":{"@type":"Answer","text":"The benefit gradually fades, because pattern hair loss carries on over time."}}]}]}
</script>