The effectiveness of PRP hair treatment, facts and figures
Hair thinning and hair loss affect millions of men and women and can be frustrating when progress feels slow or unpredictable. Genetics, hormonal changes, aging, and stress all influence how hair loss treatments work, and many people seek options that show visible improvement without plastic surgery or a long recovery. PRP has become a popular choice in modern healthcare for patients seeking non-surgical solutions for hair thinning and loss. As interest in non-surgical restoration grows, patients want to know not only if a treatment is effective but also how successful it truly is and what results they can expect. PRP hair restoration has gained popularity as a natural, clinically proven method backed by dermatologists’ expertise. During a consultation in her NYC office, Dr. Green works closely with patients to evaluate their hair loss pattern and discuss what PRP success might look like.
PRP, or platelet-rich plasma, is used to support existing hair follicles by encouraging stronger growth over time. A patient’s blood is drawn and spun in a centrifuge to separate its components, including red blood cells, white blood cells, and platelets. After spinning, the platelet-rich plasma, the top layer, is collected and injected into the area experiencing hair loss. The effectiveness of PRP depends on achieving a concentrated platelet count, as higher platelet levels are associated with greater growth factor release. These growth factors promote hair growth, making this treatment effective against hair loss.PRP also contains signaling proteins that interact with stem cell activity around the hair follicle, further enhancing hair growth. Patients typically undergo four treatments spaced one month apart and may return for maintenance sessions if the initial PRP therapy increases hair thickness and promotes hair regrowth. One of the key benefits of PRP is that it supports hair growth using the patient’s own blood, offering a non-surgical option with minimal downtime and a low risk of side effects. Receiving PRP treatments from a board-certified dermatologist, such as Dr. Michele Green, helps ensure your treatment is safe and effective.
Dr. Michele Green is a globally recognized expert in cosmetic procedures, with extensive experience treating hair loss with PRP and other advanced therapies. From her private dermatology practice on Manhattan’s Upper East Side, she has helped patients worldwide improve hair density and manage thinning through personalized treatment plans. Dr. Green is consistently ranked as one of New York’s top dermatologists by Castle Connolly, New York Magazine, Super Doctors, and The New York Times. When you consult with Dr. Michele Green, she will offer an honest, tailored assessment of your scalp and help determine whether this treatment aligns with your hair restoration goals.
What causes hair loss?
Hair loss can happen for many reasons, and the cause often varies from person to person. Changes in overall health can affect the hair growth cycle, which is why factors like illness, hormonal balance, and nutritional status often contribute to thinning and shedding. Studies have shown that by age 35, two-thirds of men experience some degree of hair loss, and there are 21 million women in the US alone who suffer from this problem. One of the most common causes is genetics, which plays a key role in androgenetic alopecia. This type of hair loss is influenced by hormones and inherited sensitivity within the hair follicles, leading to gradual thinning over time. Hormonal changes related to aging, pregnancy, menopause, or medical conditions can also disrupt the normal hair growth cycle and lead to shedding. Other causes include physical or emotional stress, illness, surgery, and significant weight changes. Certain medications and medical treatments may also contribute to thinning. Nutritional deficiencies, especially low levels of iron, vitamin D, or protein, can weaken hair growth and increase shedding. Scalp conditions such as inflammation, buildup, or poor circulation may also affect how well hair follicles function. Identifying the underlying cause is a crucial step in choosing the most effective treatment, which is why a professional evaluation is recommended before starting any hair restoration.
What is Androgenetic alopecia?
Hair loss often occurs because of changes in the body that affect how hair grows and sheds. Hair naturally goes through cycles of growth, rest, and shedding, and disruptions to this cycle can cause thinning over time. Hormonal changes are a common cause, especially during life stages like postpartum recovery or menopause. Genetics also plays a role in how long hair stays in the growth phase and how strong each strand is. Lifestyle factors such as chronic stress, insufficient sleep, or restrictive dieting can strain the hair cycle and lead to noticeable shedding. Scalp health is also important, as irritation, buildup, or inflammation can interfere with healthy growth. Knowing how these factors interact helps explain why hair loss appears and progresses differently from person to person.
Androgenetic alopecia is the most common type of hair loss and develops gradually due to a combination of genetic factors and hormonal influence. It occurs when hair follicles become more sensitive to androgens, shortening the hair growth cycle and causing each new strand to grow finer than the previous one. Over time, this process results in visible thinning and reduced density in affected areas. In men’s pattern baldness, androgenetic alopecia often presents as a receding hairline or thinning at the crown. In women, the condition typically appears as diffuse thinning across the scalp rather than as distinct bald spots. Female pattern hair loss is often more subtle early on and may become more noticeable during hormonal changes, such as after pregnancy or during menopause. Although androgenetic alopecia does not affect physical health, it can significantly impact confidence and quality of life. Early assessment is important because treatment is most effective when follicles are still active and capable of producing healthy hair.
What is PRP for Hair Loss?
PRP for hair loss is a treatment that uses a patient’s own blood to promote healthier hair growth in areas where thinning and excessive shedding have begun. PRP stands for platelet-rich plasma, which is a component of blood with a high concentration of platelets and growth factors involved in tissue repair. Platelet-rich plasma is a blood component that is separated and concentrated blood used to support hair follicles and encourage healthier hair growth. These elements improve the scalp’s overall condition and help existing hair follicles produce stronger strands. PRP supports the anagen phase of the hair growth cycle, the active growth stage when follicles produce thicker, healthier hair. During the treatment, the platelet-rich plasma is prepared and injected into targeted areas of the scalp experiencing hair loss. The goal is not to create new follicles but to strengthen the existing ones and encourage more consistent growth over time. PRP is commonly used for both men and women with early to moderate androgenic alopecia and is often chosen by patients seeking a natural approach without surgery or daily medications. PRP works best for patients in the early stages of hair loss, when follicles are still active and responsive to treatment.
How effective is PRP for hair loss?
PRP hair restoration can be effective for many people experiencing thinning hair. Still, instead of focusing only on percentages, it’s helpful to understand how the treatment performs in real clinical situations. A 2020 controlled trial reported that patients treated with PRP had scalp areas with hair density increasing by approximately 71 hairs per square centimeter at 8 weeks and approximately 106 hairs per square centimeter at 24 weeks compared with baseline. In contrast, control areas showed decreases over the same period. This shows a clear numeric improvement in thinning areas after PRP injections. In clinical research, PRP has also been compared to placebo treatments, with PRP consistently showing greater improvements in hair density and hair count than placebo over the same time period.
Additionally, a 2025 clinical study reported that after three monthly PRP sessions, hair density on the treated side increased by approximately 19.1% from baseline at 6 months. This demonstrates measurable thinning in areas treated with PRP over time. Many patients continue to show sustained improvements in hair density and quality at the one-year mark when appropriate maintenance treatments are followed after PRP. This evidence indicates that PRP is a viable treatment option that many people choose because it uses the body’s own platelets and is minimally invasive. The results tend to be most effective for those who begin treatment early, when active follicles are still present. PRP can also be combined with other therapies, and a consultation helps tailor the approach to each person’s specific hair loss pattern and severity. Overall, while results vary from person to person, recent clinical trials show that PRP is an excellent option for those seeking to increase hair density and slow thinning. High patient satisfaction with PRP is often linked to gradual, natural-looking improvement and the ability to maintain results through ongoing care rather than aggressive intervention.
What are the Side Effects of PRP?
PRP hair treatments are generally well tolerated, and side effects tend to be mild because the procedure uses a patient’s blood. The most common reactions occur at the injection sites and may include temporary redness, tenderness, swelling, or slight scalp soreness. Some patients notice minor pinpoint bleeding during the treatment, which usually resolves quickly. A feeling of tightness or scalp sensitivity can also occur for a short time after the session. More serious side effects are rare when an experienced provider performs PRP. Infection and allergic reactions are uncommon since no synthetic substances are injected into the body. A small number of patients may experience a temporary increase in shedding shortly after treatment, which is related to the natural hair growth cycle rather than follicle damage. These effects usually resolve on their own, and most patients can return to their normal activities the same day. Getting PRP treatments from a board-certified dermatologist, like Dr. Green, helps ensure the procedure is performed safely and that expectations for side effects and recovery are clear before treatment begins.
Other hair loss treatments
Various medical and non-medical treatments can encourage hair growth or help slow ongoing thinning. These options are often used alone or in combination with procedures such as PRP for a more comprehensive approach.
Finasteride: A prescription medication commonly used for male-pattern hair loss. It works by lowering the hormone dihydrotestosterone (DHT), which causes follicles to shrink, helping to slow thinning and support stronger regrowth over time. Many patients notice steadier shedding patterns and increased density with consistent use. It is taken once daily and is mostly recommended for men, although some women may be candidates in specific cases. Regular follow-up is essential so a dermatologist can monitor the response and any changes.
Spironolactone: an oral medication often used for women with hormonal hair loss. It works by reducing the impact of androgens on the follicles, helping prevent weakening and promoting healthier, fuller growth over time. It is especially helpful for women who also experience hormonal acne or irregular cycles. Treatment requires regular monitoring, and the dose is adjusted based on the patient’s needs and response. It is taken daily and can be a good option for women who are not candidates for finasteride.
Topical Minoxidil: This is an FDA-approved treatment for androgenetic alopecia, widely known by the brand name Rogaine. It helps extend the hair growth phase and improves scalp circulation, leading to thicker, healthier strands over time. Many patients apply it once or twice daily, and consistent use is essential because stopping treatment often causes hair thinning to return. Many people experiencing hair loss choose this option because it’s available over the counter, making it a convenient treatment choice.
Oral Minoxidil: This medication was originally developed to treat high blood pressure, so patients need medical clearance before starting it. Dermatologists prescribe it at very low doses for hair loss, and these doses are usually not strong enough to affect blood pressure in healthy patients. Oral minoxidil is not FDA-approved for treating hair loss, but dermatologists have used it for many years and have helped patients who prefer a pill or do not respond well to topical products. It is taken once daily and can promote more consistent growth across the entire scalp.
Topical Formulas: Dr. Green provides topical treatments with her MGSkinLabs hair serums for both men and women. These formulas aim to support scalp health and encourage stronger, more consistent growth. The serums for men and women contain ingredients that help minimize inflammation, strengthen existing strands, and nourish the scalp, allowing follicles to stimulate hair growth. They are applied directly to thinning areas and can be used alongside PRP or oral medications as part of a comprehensive hair restoration plan. These serums deliver targeted care and allow patients to follow a simple at-home routine that easily fits into their daily schedule.
Hair Growth Supplements: Supplements can support hair health when nutritional gaps lead to thinning. These products often include vitamins and minerals such as biotin, zinc, and iron, along with botanical ingredients like saw palmetto and ashwagandha that promote stronger growth and overall hair health. They are most effective for individuals with deficiencies identified through evaluation, such as low iron or vitamin D. Supplements work gradually and are usually taken daily to maintain long-term balance. They can be combined with other treatments to help improve hair loss and thinning.
Low-Level Laser Therapy: Low-level laser devices emit red and infrared light to stimulate the scalp and encourage healthier hair growth. The light penetrates the skin and increases cellular activity within the follicles, which can help strengthen hair and promote growth. Patients use these devices several times a week, and many find that the treatment easily fits into their daily routines. Over time, thinning areas may appear fuller as the follicles produce stronger strands. This option can be combined with PRP or medication for additional benefits.
Hydrafacial Keravive: a specialized scalp treatment that cleanses and exfoliates to remove buildup and flakes. It also nourishes the scalp with a blend of hydrating ingredients that create a healthier environment for hair growth. The treatment helps improve circulation and can make the scalp feel refreshed and more balanced. Patients often notice that their scalp feels cleaner and their hair looks healthier after the session. It can also complement other hair restoration treatments by supporting overall scalp comfort and enhancing scalp response to treatment.
Hair Transplant Surgery: Hair transplant surgery is an option for people with advanced thinning who no longer have active follicles in certain areas. Follicles are carefully removed from the back or side of the scalp and placed into areas that lack density. The transplanted follicles continue to grow naturally and provide lasting results. This procedure can create a fuller hairline or restore patches that no longer respond to non-surgical treatments. A consultation with a hair restoration specialist helps determine if someone is a candidate. PRP can be performed after a hair transplant to boost hair growth and density further.
These treatments work in different ways and provide varying benefits depending on the cause and severity of hair loss. A consultation with Dr. Michele Green helps identify the best combination for each patient’s needs.
How many PRP sessions are needed for hair growth?
Most patients require a series of PRP sessions to notice visible hair growth. When starting PRP treatment, patients typically undergo four sessions spaced one month apart. This allows hair follicles to respond to growth factors, promoting hair growth and giving a fuller appearance. After the fourth session, patients typically return about three months later for another treatment, during which Dr. Green will assess hair growth and confirm the treatment’s effectiveness. If there is significant improvement, most patients continue maintenance visits two to three times per year to maintain optimal results. The exact number of sessions can vary depending on factors such as the severity of hair loss and the condition of existing follicles, all of which influence how the scalp responds. A consultation helps create a personalized plan tailored to each individual.
What percentage of PRP procedures are successful?
PRP hair treatment success rate depends on factors such as the stage of hair loss, follicle activity, and the consistency with which the treatment is followed, which is why individual results can vary. Patients with early-to-moderate androgenetic alopecia usually respond best because their follicles are still present and capable of producing new growth. This group generally shows steady progress once concentrated growth factors in platelet-rich plasma are injected, helping support stronger strands throughout each hair cycle. A systematic review of PRP studies found that about 84% of the trials reported a positive effect of PRP on hair regrowth in androgenetic alopecia, indicating that most studies showed improvements in density, thickness, or both after treatment. These findings back up what many patients notice during treatment: a gradual thickening of the hair and less shedding after completing a full series. Besides improving density, many patients also see better hair quality, with strands that feel stronger over time. During a consultation, Dr. Green will assess the pattern and severity of hair loss to see if PRP treatments could help, and this evaluation helps her create a personalized plan based on your scalp’s condition, individual needs, and overall goals.
Can PRP cause hair loss?
PRP does not cause permanent hair loss and is considered a very safe option for individuals with thinning hair. The treatment uses a patient’s own blood, so there is no risk of rejection or follicle damage when performed correctly. Some patients notice a brief increase in shedding in the early weeks after their session, which may seem concerning, but this reflects the natural shedding phase of the hair cycle rather than a negative reaction. Older strands often fall out as the follicles prepare to grow stronger, healthier hair. This change is temporary, and most patients see their shedding slow down as the follicles respond to treatment. Hair thinning directly caused by PRP should not happen when an experienced provider administers the procedure. This makes PRP a reassuring option for individuals seeking fuller, healthier hair without risking further loss.
How long does PRP take to work for hair loss?
The timeline for noticing the effects of PRP treatments varies among patients, with most experiencing gradual changes rather than all at once. The first sign that the treatment is working is often reduced shedding, which can happen before any visible thickening. The hair then starts to feel stronger at the roots, and areas that looked thin begin to appear more even as new strands grow in. These changes usually occur slowly, and the hair’s overall appearance generally becomes fuller over time. Although everyone progresses at a different rate, PRP typically shows results within the first few months and continues to improve with consistent treatment.
What is the process of getting PRP hair treatments?
The process of PRP hair treatments begins with a consultation, during which the scalp and hair loss pattern are carefully evaluated. During this visit, Dr. Green reviews medical history, discusses concerns, and explains what PRP can realistically achieve based on the hair loss condition. Blood will also be drawn, and Dr. Green will review the results to develop a treatment plan that addresses the underlying cause of hair loss and to determine whether PRP is suitable. Patients can ask questions and gain a clear understanding of how their treatment works and what to expect over time. If the patient is a good candidate for PRP, the procedure starts with drawing a small amount of blood. The blood is then processed in a centrifuge to isolate the platelet-rich plasma used for treatment. This plasma is injected into the areas of hair loss or thinning. While some discomfort may occur, the procedure is quick, and most patients tolerate the injections well. Temporary redness or tenderness might happen, but usually resolves quickly, allowing patients to resume normal activities shortly afterward. PRP treatments are performed in a series of four sessions spaced one month apart at Dr. Green’s office. Patients return a few months after completing the series for an evaluation, and periodic maintenance treatments are recommended to sustain results over time.
Other Frequently Asked Questions (FAQs)
Can PRP regrow hair?
Yes! PRP can help regrow hair in areas where follicles are still present and capable of producing new growth. Treatment works by delivering concentrated platelets from a patient’s own blood into the scalp to support healthier follicles. These platelets contain growth factors that improve circulation around the follicle and promote hair growth over time. Studies have shown that many patients experience increased hair density and a noticeable reduction in hair shedding after completing a series of PRP sessions. PRP is most effective for early-to-moderate forms of androgenetic alopecia rather than for bald spots, since the growth factors in platelets cannot activate follicles to produce hair. Results develop gradually, and most patients schedule several initial treatments, followed by occasional maintenance sessions to maintain the improvement.
How much time does PRP take to regrow hair?
PRP does not deliver results overnight; most patients notice gradual changes over the first few months. The earliest signs usually include less shedding and a healthier appearance of existing hair. Fuller areas often begin to develop around 3 to 4 months after the scalp has had time to respond to the initial series of treatments. The most noticeable improvement often occurs after completing all four sessions and allowing the hair cycle to progress. Growth will continue with each maintenance visit and is crucial for preserving initial results. Each patient’s timeline varies slightly, but PRP generally works steadily and gradually, producing a natural-looking improvement over time.
What is the success rate of PRP hair treatment?
PRP is a popular choice for many people with thinning hair, especially when treatment starts early, before the hair becomes very sparse. The treatment promotes healthier new hair growth, and many patients notice their hair appears fuller over time. One reason PRP is considered effective is that it works with the body’s natural processes rather than relying on medication. Results typically develop gradually, providing a natural-looking increase in density and coverage. In a recent randomized trial, patients treated with PRP showed an increase in hair count from 120 to 162 hairs per square centimeter over 12 months. This shows a 35% increase in hair density over the study period. Success also depends on following a proper treatment plan and maintaining it so the results continue to improve. PRP is not meant to restore bald areas fully, but it can offer a visible boost for those with active follicles who want a natural, low-risk option.
Does PRP hair restoration work?
PRP hair restoration works by strengthening existing follicles and encouraging healthier growth over time. The treatment involves injecting concentrated platelets from a patient’s own blood into areas of thinning, creating a more supportive environment for the follicles. Many patients begin to notice that shedding becomes more controlled and that their hair feels and looks fuller with repeated treatments. The improvements happen gradually, and the most noticeable changes occur after completing a series of sessions. PRP is more effective when the follicles are still active, which is why early-to-moderate thinning responds best. Fully bald areas cannot be restored with PRP because the follicles are no longer functioning. For suitable candidates, PRP can provide a natural, noticeable boost in density and help maintain healthier hair growth over time.
How long does it take for PRP to work on hair?
Most patients notice early improvements with PRP within 2 to 3 months. However, the full benefits develop gradually as the follicles respond to the growth factors in the platelet-rich plasma. The body needs time to strengthen existing follicles and support new growth, so visible thickening typically becomes more noticeable after completing a full treatment series. Dr. Green finds that the best results come from four PRP sessions spaced one month apart. This schedule allows each session to build on the previous one and fosters steady improvements in hair density and shedding. After the initial sessions are complete, Dr. Green assesses the patient’s progress and creates an individualized maintenance plan. Hair naturally cycles through growth and shedding, so ongoing maintenance is essential to sustain results.
How successful is PRP for hair loss?
PRP can be a very helpful option for many people dealing with thinning hair, especially when treatment begins before the follicles become inactive. The goal of PRP injections is to increase growth factors in areas that are thinning, so the hair can grow stronger and with better coverage. Many patients notice that their hair feels fuller and that daily shedding becomes more manageable after completing a full series of sessions. The treatment works best when it is part of a consistent plan, and results tend to last longer when maintenance visits are kept up year-round. PRP is not a solution for every type of hair loss. Still, for individuals with early-to-moderate androgenetic alopecia, it can offer significant improvement in overall thickness and help stabilize ongoing thinning. A consultation helps determine whether someone’s hair-loss pattern is well-suited to this procedure.
How to get started with PRP treatments today?
Hair thinning and hair loss are common concerns for both men and women, and they can be frustrating to address because there are many options. Genetics, hormonal changes, stress, and aging all influence the hair growth cycle, leading to increased shedding and decreased density that don’t always improve with lifestyle modifications or topical treatments alone. As interest in non-surgical hair restoration continues to grow, many patients seek solutions that provide visible results without surgery or downtime. PRP hair restoration has become a popular choice for individuals seeking to support healthier hair growth with treatments that fit into a busy schedule. PRP works by strengthening existing hair follicles and improving scalp health, helping reduce shedding and boosting overall hair thickness over time. If you’re experiencing thinning hair or hair loss and want to explore non-surgical options, a consultation with Dr. Green can help determine whether PRP is right for you.
Dr. Michele Green is a highly respected, board-certified dermatologist who provides advanced hair restoration treatments, including PRP, at her private dermatology practice in New York City. With over 25 years of experience in cosmetic dermatology, she is consistently recognized by Castle Connolly, New York Magazine, The New York Times, and SuperDoctors as one of the top dermatologists in New York. Dr. Green is known for her personalized approach and focus on natural-looking results, creating treatment plans that align with each patient’s goals and hair-loss concerns. Many patients trust Dr. Green for her expertise in PRP and other non-surgical hair restoration options, thanks to her careful approach and reliable results. If you are interested in PRP hair restoration, call our office at 212-535-3088 or contact us online to schedule a consultation and learn more about your personalized treatment options.