PRP Therapy Explained: What Patients Need to Know

What Is PRP Therapy?

PRP stands for platelet-rich plasma. The process starts with a blood draw. A doctor takes blood from your arm. The blood goes into a machine. The machine spins the blood at high speed. This spinning separates the blood into layers. Platelets settle at the bottom. Platelets are blood cells that help with clotting. They contain proteins called growth factors. Clinics collect these platelets. They create a concentrated liquid. This liquid is the PRP.

The doctor then injects the PRP into your body. They may inject it into a joint. They may inject it into a tendon. They may inject it into the scalp for hair. They may inject it into the skin for aging. The goal is to place a high number of platelets in one spot. The clinic hopes this will start a biological response. The clinic hopes this response will help your condition. The clinic does not promise it will work.

How Is It Regulated?

PRP is not a drug. It is a procedure. The FDA regulates drugs and medical devices. The FDA has a different path for some medical procedures. This path is called the "same-sexual, same-purpose" exemption. It applies when a clinic uses your own cells. The clinic takes the cells from you. The clinic puts them back into you. The clinic does not change the cells in a lab. The clinic does not mix them with other drugs.

This regulatory path means PRP is not an approved drug. The FDA has not approved PRP for any specific disease. The FDA has approved some stem cell products. These are for blood disorders. They are not for knee pain or hair loss. Most PRP products sold by clinics are not FDA-approved. They are considered minimally manipulated. This is a legal category. It is not a safety stamp. It does not mean the product is safe. It does not mean the product works.

Where Is PRP Offered?

PRP is one of the most common regenerative services. You can find it in many types of clinics. Orthopedic doctors offer it for joints. Sports medicine clinics offer it for injuries. Dermatologists offer it for skin. Hair restoration clinics offer it for baldness. Aesthetic clinics offer it for aging.

Marketing often groups PRP with stem cell therapy. This is confusing. PRP is not stem cell therapy. Stem cells can become many types of cells. Platelets are mature cells. They do not turn into new tissue. They release proteins. These proteins may affect nearby cells. The effect is not fully understood. The marketing often hides this difference. It uses words like "regenerative." This word sounds like growth. It does not mean new tissue grows. It may mean inflammation changes.

What Does the Evidence Say?

Research on PRP is mixed. The results depend on the body part. The evidence for hair loss is also mixed. Some people see thicker hair. Some people see no change. The evidence for skin aging is limited. Most studies are small. They lack long-term data.

Scientists debate how PRP works. There is no standard protocol. One clinic may use one method. Another clinic may use a different method. This makes comparison hard. It also makes results hard to predict. You cannot assume a result from one clinic will happen at another. The biological response varies by person. Your age affects the platelets. Your health affects the platelets. Your injury affects the response.

Questions to Ask Before You Go

Do not sign a contract without asking questions. Ask about the specific protocol. Ask how they prepare the blood. Ask about the spin counts. Ask if the PRP is leukocyte-rich or leukocyte-poor. Leukocytes are white blood cells. Some protocols keep them. Some remove them. The choice may affect inflammation. Ask how many sessions you need. One session may not be enough. Multiple sessions may cost more. Ask if they use imaging guidance. Ultrasound helps the doctor see the needle. It helps place the PRP in the right spot. Blind injections may miss the target.

Ask about the cost. PRP is usually not covered by insurance. It is an out-of-pocket expense. Ask for the price per session. Ask for the total price for the recommended plan. Ask about the doctor's experience. Ask how many PRP injections they have done. Ask if they have data on their own patients. Be wary of patient stories used as proof. One story is not data. Ask if they have published results. Ask if they have peer-reviewed studies. Ask about risks. Ask about side effects. Ask what happens if it does not work.

Is It Safe?

PRP uses your own blood. This lowers the risk of rejection. Your body does not fight its own cells. This is a safety advantage over donor cells. Any injection carries risk. You can get an infection. You can get bleeding. You can get nerve damage. You can get pain at the site. You can get swelling. You can get bruising.

The spinning process is generally safe. The injection is the main risk. The risk depends on the doctor's skill. The risk depends on the site. Injecting near a nerve is riskier. Injecting into a joint is common. Injecting into the scalp is common. Injecting into the skin is common. The risk is not zero. The risk is not eliminated by using your own blood. You must weigh the cost against the risk. You must weigh the cost against the uncertainty of results.

Consult Your Own Doctor

Talk to your primary care physician. Talk to a specialist you trust. Show them this information. Ask them to review the clinic's claims. Ask them to review the proposed protocol. Ask them to review the risks for your specific health. Do not rely on the clinic's website. Do not rely on brochures. Do not rely on online reviews. Verify the clinic's license. Verify the doctor's board certification. Verify the facility's accreditation. Check for any disciplinary actions. Make your own decision. Do not feel pressured. Take your time. Get a second opinion.