PRP for Hair Loss: A Physician’s Guide to Candidates, Treatment Schedules and the Research Behind It

Hair loss is rarely just about hair. As an internist, I’ve seen thinning point to thyroid disease, iron deficiency, hormonal shifts and the aftermath of a serious illness. So when someone comes to our Hudson office asking about platelet-rich plasma, my first goal is to understand why the hair is thinning. The answer determines whether PRP makes sense at all.

In this guide I’ll cover how PRP is thought to work on the scalp, who tends to benefit, what a treatment schedule looks like, and what the research supports.

How PRP works on hair follicles

Platelets carry growth factors involved in tissue repair and blood-vessel formation. When a concentrate of your own platelets is injected into the scalp, the goal is to support follicles that are shrinking, a process called miniaturization, and to extend the growth phase of the hair cycle. PRP does not create new follicles. It works on follicles that are still alive but underperforming.

That single fact explains most of who does and doesn’t respond.

Who is a good candidate

• Early to moderate androgenetic alopecia: male-pattern thinning at the crown or hairline, or female-pattern widening of the part.
• People with visible fine, miniaturized hairs in the thinning area, which signals follicles that are still present.
• Patients who want to add to medical therapy or who cannot tolerate certain medications.
• Those with realistic goals: improved density and slowed loss rather than a full restoration.

Who is not a good candidate

• Areas that have been smooth and bald for years, where follicles are gone. Transplant surgery is a better conversation there.
• Scarring alopecias, which need a dermatologist’s diagnosis and targeted treatment.
• Hair loss from an untreated medical cause such as thyroid disease, anemia or a medication side effect.
• People with platelet disorders, active scalp infection, active cancer, or who are pregnant.

Sudden shedding, patchy loss, scalp pain or burning, or hair loss with fatigue, weight change or irregular periods all deserve a medical evaluation first. We can start with lab testing to look for contributing factors.

What a treatment schedule looks like

Protocols vary, but a common approach is:

1. Initial series: about three sessions, spaced roughly four weeks apart.
2. Assessment: standardized photos at baseline and again after several months.
3. Maintenance: for responders, a session every four to six months or so.

Each visit involves a blood draw, about 15 minutes of processing, and injections across the thinning areas after numbing. The whole appointment typically takes under an hour.

Patience is essential. Hair grows slowly, and early shedding sometimes happens as follicles cycle. I ask patients to judge progress at six months rather than six weeks.

What the evidence shows

A number of randomized and half-head controlled trials in androgenetic alopecia have reported improvements in hair density and thickness with PRP compared with placebo. Two widely cited examples are a 2015 placebo-controlled trial by Gentile and colleagues and a 2016 double-blind half-head study by Alves and Grimalt.

The limitations matter too. Many studies are small, follow-up is often short, and preparation methods differ widely, which makes it hard to compare results. PRP is not FDA-approved as a hair-loss treatment; it is used in an off-label manner with devices cleared for preparing plasma. I present it as a reasonable, low-risk option with moderate supporting evidence, not a guaranteed fix.

PRP works best as part of a plan

In my practice, the strongest results come from combination care: PRP alongside proven medical therapy when appropriate, attention to nutrition and hormones, and gentle hair-care habits. For some patients, evaluation through our hormone optimization program is part of that picture. You can learn more about our approach on our PRP hair restoration page.

Frequently asked questions

Is PRP for hair loss permanent?

No. Androgenetic alopecia is progressive, so maintenance sessions are usually needed to hold results. Stopping treatment typically allows thinning to resume over time.

Does PRP work for women?

Yes, women with female-pattern hair loss are often good candidates. We also screen for iron, thyroid and hormonal contributors that commonly affect women.

Can I use minoxidil with PRP?

Many patients do, and combining approaches is common. Your provider will advise when to pause topical products around treatment days.

How painful are scalp injections?

Most people describe pressure and brief stinging. We use numbing and comfort techniques, and the scalp is usually sore for only a day or two.

Take the first step

If you’re noticing more scalp than you used to, let’s find out why. Book a complimentary, no-commitment consultation; treatments are performed or supervised by trained medical professionals under my oversight.

• Hudson, OH: 50 W Streetsboro St, Suite 2 · (330) 460-5915
• Barboursville, WV: 1 Chateau Grove Ln · (304) 520-0461

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References: Gentile P, et al. The Effect of Platelet-Rich Plasma in Hair Regrowth: A Randomized Placebo-Controlled Trial. Stem Cells Translational Medicine. 2015. · Alves R, Grimalt R. Randomized Placebo-Controlled, Double-Blind, Half-Head Study to Assess the Efficacy of Platelet-Rich Plasma on the Treatment of Androgenetic Alopecia. Dermatologic Surgery. 2016. · American Academy of Dermatology. Hair loss: diagnosis and treatment. AAD. aad.org

This article is for general information only and is not medical advice. Treatments are provided only after consultation and evaluation by a licensed provider. Individual results vary.