What Is PRP Therapy? Uses, Evidence & What to Expect

The short version: PRP — platelet-rich plasma — is made from a small sample of your own blood, spun down to concentrate the platelets and the growth factors they carry, then injected where a provider is trying to encourage healing. It's used in three very different settings: orthopedic and soft-tissue pain, aesthetic skin treatments, and hair loss. PRP is popular because it uses your own biology and avoids surgery, but the evidence differs by use, and for most of these applications PRP is either investigational (orthopedic), off-label (hair), or cosmetic (skin) — not an FDA-approved treatment for the condition. This guide explains how it works, what it's realistically used for, and how to evaluate it carefully.

Key takeaways

• PRP is an autologous procedure — it uses platelets concentrated from your own blood.
• It's applied across three areas: joint/pain, skin/aesthetics, and hair loss.
• PRP is not FDA-approved as a treatment for orthopedic pain, hair loss, or skin rejuvenation; some preparation devices are FDA-cleared, which is not the same thing.
• Because it uses your own blood, allergic reaction is unlikely and it's generally low-risk — but no procedure is risk-free.
• PRP is generally less expensive than stem cell therapy and usually not covered by insurance.

How PRP is made and how it's thought to work

The process is straightforward. A provider draws a small amount of your blood, much like a routine lab test, and places it in a centrifuge that separates the blood into layers. The platelet-rich layer is collected — this is the "PRP." Platelets are best known for clotting, but they also release growth factors and signaling proteins that play a role in the body's natural repair process. The concentrated PRP is then injected into the target area, often with ultrasound guidance for joints or with microneedling for skin.

The idea behind PRP is that delivering a concentrated dose of these growth factors to an injured or aging area may support the local healing environment. That is a reasonable hypothesis, and it's an active area of research — but "thought to support healing" is not the same as "proven to fix the problem," and how well it works appears to vary a lot by condition and by individual.

What PRP is used for

PRP shows up in three distinct settings, each with its own evidence picture and its own honest caveats:

• Joint & soft-tissue pain. PRP is injected for knee, shoulder, hip, and back pain, as well as tendon and ligament injuries. See our deep dive on PRP therapy for joint pain.
• Skin & aesthetics. Often marketed as a "vampire facial," PRP is used cosmetically for skin texture, fine lines, and acne scarring — usually alongside microneedling. See PRP for skin & facial rejuvenation and PRP for acne scars.
• Hair loss. PRP is injected into the scalp, most often for pattern hair loss. See our hub on PRP for hair loss and our guide for female hair thinning.

What the evidence actually shows

"Not FDA-approved" is not the same as "no evidence." PRP has been studied across all three of its use areas — thousands of papers are indexed on PubMed and many trials are listed on ClinicalTrials.gov. The honest summary is that the picture is mixed and varies by use: some studies report benefit, others show little difference from placebo, and protocols differ widely between clinics (how the PRP is prepared, how concentrated it is, and how many sessions are given all vary). That inconsistency is exactly why you'll see both enthusiastic claims and cautious reviews about the same treatment. Treat any provider who quotes a single dramatic success rate with skepticism, and ask what the evidence shows for your specific use.

PRP vs. stem cell therapy

These two regenerative options are often confused. The key difference: PRP concentrates platelets and growth factors from your blood, while stem cell therapy uses cells — such as mesenchymal stem cells (MSCs) from bone marrow, fat, or donated umbilical cord tissue. PRP is generally simpler to prepare and less expensive; stem cell therapy is more involved and costlier. Neither is FDA-approved for orthopedic pain, and both are sometimes used together. To understand the cell-based side, see our complete guide to stem cell research and our MSC research for orthopedic pain review.

Is PRP FDA approved, and is it safe?

This is where careful wording matters. PRP is prepared using devices, and some of those preparation systems are FDA-cleared as devices — but the FDA has not approved PRP as a treatment for orthopedic conditions, hair loss, or skin rejuvenation. In practice that means orthopedic PRP is investigational, hair-loss PRP is off-label, and aesthetic PRP is cosmetic. For the broader regulatory context, see our guide to whether stem cell therapy is FDA approved.

On safety: because PRP uses your own blood, the risk of an allergic or immune reaction is low, and it's generally considered a low-risk procedure with a qualified provider. Still, no procedure is risk-free. Reported risks include infection, bleeding, swelling, and pain at the injection site. Improper handling of blood products has caused serious harm in some documented cases — which is the central reason that who performs the procedure and how the blood is handled matter so much.

What does PRP cost?

PRP is not standardized in price and is typically paid out of pocket. As a general reference, single sessions commonly range from roughly $500 to $2,500, depending on the area treated, how many sessions are recommended, and the clinic. It is usually less expensive than stem cell therapy. For a full breakdown across joint, skin, and hair, see our guide to PRP therapy cost.

Questions to ask a PRP provider

• Is PRP investigational, off-label, or cosmetic for my specific use?
• What does the published evidence honestly show for my condition?
• How is the PRP prepared and concentrated, and how many sessions do you recommend?
• What are the realistic expected outcomes and the risks?
• What is the total cost, and what follow-up is included?

This is exactly where Regenerative Treatment Guide helps: rather than pointing you to any single clinic, we match you with verified, board-certified providers based on your goals and location, so you can have an informed conversation.

Frequently asked questions

Keep reading

• PRP Therapy for Joint Pain: Knee, Shoulder, Hip & Back
• PRP for Skin: Facial Rejuvenation & the "Vampire Facial"
• PRP for Acne Scars: Does It Work?
• PRP for Hair Loss: What the Research Says
• How Much Does PRP Therapy Cost?
• Is Stem Cell Therapy FDA Approved? Safety & Risks
• Stem Cell Research: The Complete Guide