PRP & Mesotherapy: Benefits, How It Works, Hair Growth & Skin Rejuvenation
Platelet-rich plasma and mesotherapy are widely used in professional aesthetic medicine for facial rejuvenation, scalp treatments and targeted injectable skincare protocols. This guide explains what PRP is, how mesotherapy differs, where the clinical evidence is strongest and how professional injector systems such as the THEIA U225 can support controlled treatment workflows.
What Is PRP?
PRP stands for platelet-rich plasma. It is an autologous preparation made from a person's own blood and contains a higher concentration of platelets than whole blood.
Platelets contain signalling proteins and growth factors involved in normal tissue repair and wound healing. Depending on the clinical protocol, PRP may be injected into selected areas of the skin or scalp by an appropriately trained professional.
PRP is used in several medical and aesthetic fields. In aesthetic practice, common areas of interest include facial skin quality, selected acne-scar protocols and androgenetic hair loss.
Preparation protocols vary considerably between systems, including centrifugation method, platelet concentration and whether additional blood components are retained or removed.
How Is PRP Prepared and Applied?
Exact protocols vary, but a professional PRP procedure generally involves several key stages.
Blood Collection
A small amount of venous blood is collected using an appropriate sterile collection system.
Centrifugation
The blood is centrifuged according to the selected preparation protocol to separate components and concentrate platelets.
PRP Preparation
The platelet-rich fraction is collected according to the specific PRP system and professional protocol being used.
Targeted Application
PRP can then be delivered to selected facial or scalp areas using manual injection techniques or a compatible professional injector system.
What Growth Factors Are Associated With PRP?
Platelets release multiple signalling proteins involved in normal tissue repair. Frequently discussed PRP-associated factors include:
Involved in cellular signalling, tissue repair and vascular responses.
Participates in extracellular matrix regulation and tissue remodelling.
Plays an important role in signalling pathways related to blood-vessel formation.
Associated with epithelial cell growth and tissue-repair signalling.
Participate in fibroblast activity and several tissue-regeneration processes.
A signalling molecule involved in growth and normal cellular physiology.
What Is Mesotherapy?
Mesotherapy is an umbrella term for techniques in which small quantities of selected substances are delivered through multiple superficial injections into or immediately beneath the skin.
Depending on the jurisdiction, product and indication, professional mesotherapy protocols may involve ingredients such as non-cross-linked hyaluronic acid or other specifically formulated injectable solutions. The composition and legal status of injectable products vary by market.
Unlike PRP, mesotherapy does not necessarily use material derived from the patient's own blood. The two approaches may therefore be used independently or within separate professional treatment plans.
What Are PRP and Mesotherapy Used For?
Facial Skin Quality
PRP has been studied for facial rejuvenation outcomes including texture, elasticity and patient-perceived improvements.
Androgenetic Hair Loss
This is one of the better-studied aesthetic uses of PRP, particularly for improving hair density in androgenetic alopecia.
Scalp Protocols
Targeted injection methods allow professionals to distribute PRP or suitable mesotherapy products across selected scalp areas.
Face & Neck
Professional mesotherapy protocols may be used on selected facial, neck and décolleté treatment areas depending on the product used.
Acne-Scar Protocols
PRP is also used as part of some professional protocols targeting the appearance of selected acne scars.
Customized Injection Plans
Adjustable depth, spacing and volume allow trained professionals to tailor treatment patterns to different anatomical areas.
What Does the Evidence Say About PRP?
The evidence differs substantially by indication. Research on androgenetic alopecia is relatively extensive, while evidence for facial rejuvenation remains promising but more heterogeneous.
A 2023 meta-analysis included nine randomized controlled trials involving 238 patients.
A 2024 meta-analysis reported a pooled increase in hair density versus placebo, although study heterogeneity was very high.
A systematic appraisal identified 36 studies involving 3,172 patients, but study quality and outcome measures varied widely.
PRP and Androgenetic Alopecia
A meta-analysis of nine randomized trials involving 238 patients found statistically significant increases in hair density at three and six months compared with placebo. The analysis did not find serious adverse reactions in the included trials.
Hair Density: Positive Signal, Low-Certainty Evidence
A placebo-controlled meta-analysis reported an average increase of 27.55 hairs/cm². However, heterogeneity was approximately 96%, and the authors rated the underlying evidence as low quality.
PRP for Facial Rejuvenation
Systematic reviews have found encouraging results for facial rejuvenation, but the literature is limited by small studies, subjective outcome measures and inconsistent protocols. Higher-quality randomized trials are still needed.
PRP should not be marketed as a guaranteed anti-ageing or hair-growth treatment. Outcomes vary with indication, preparation technique, platelet concentration, injection protocol and patient characteristics.
THEIA U225 Professional Mesotherapy & PRP Injector
The THEIA U225 is designed to support controlled professional mesotherapy and compatible PRP injection workflows. Its electro-pneumatic system allows practitioners to adjust injection depth and pressure while maintaining consistent high-speed operation.
Injection depth can be adjusted according to the selected treatment area and professional protocol.
Controlled pressure settings allow practitioners to configure delivery according to their treatment workflow.
Supports up to 425 injection points per minute for efficient, repeatable professional application.
Designed for controlled handling during professional facial and scalp treatment workflows.
PRP vs. Mesotherapy: What Is the Difference?
PRP and mesotherapy are not interchangeable terms. PRP refers to an autologous blood-derived preparation, whereas mesotherapy describes a superficial injection technique that may use specifically formulated injectable products.
Both may involve multiple controlled injection points and can therefore require similar precision in depth, spacing and delivery. This is where professional injector systems can be useful in appropriate clinical or aesthetic workflows.
PRP preparation and injection, as well as injectable mesotherapy, should be carried out only by appropriately trained professionals and in accordance with applicable local laws. Contraindications can include certain blood disorders, platelet abnormalities, infection, pregnancy-related considerations, anticoagulant use and other medical factors. Sterile technique and appropriate patient assessment are essential.
PRP & Mesotherapy FAQ
What is platelet-rich plasma?
Platelet-rich plasma is an autologous blood-derived preparation containing a higher concentration of platelets than whole blood. It is used in several medical and aesthetic applications.
Does PRP help hair growth?
Randomized trials and meta-analyses suggest PRP can increase hair density in some patients with androgenetic alopecia. However, results differ between studies, and treatment protocols remain variable.
Does PRP rejuvenate facial skin?
Studies have reported improvements in selected facial-rejuvenation outcomes, but the evidence is less consistent than for hair-density outcomes. Larger standardized trials are still needed.
What is mesotherapy?
Mesotherapy refers to the delivery of small amounts of selected substances through multiple superficial injections. The products, indications and regulatory requirements vary between jurisdictions.
Is PRP the same as mesotherapy?
No. PRP refers to a specific autologous blood-derived preparation. Mesotherapy refers to an injection technique and may use different injectable products depending on the protocol.
How many PRP treatments are needed?
There is no universal schedule. Published studies use different numbers of sessions and intervals. Treatment planning should depend on the indication, patient characteristics and professional assessment.
What are common side effects after PRP injections?
Temporary discomfort, redness, swelling, pinpoint bleeding, bruising or itching may occur around injection sites. Individual risk depends on the treatment area and patient factors.
What does the THEIA U225 do?
The THEIA U225 is a professional electro-pneumatic injector designed to support controlled mesotherapy and compatible PRP workflows with adjustable injection depth, pressure and high-speed operation.
Who is the THEIA U225 designed for?
The device is intended for appropriately trained professional users working within applicable local regulations and professional treatment protocols.