Cosmetic and Regenerative Procedures for Hair Loss: PRP, Exosomes, Lasers, and Scalp Health

Conclusions

• For scarring alopecias, procedural and cosmetic interventions may help stabilize disease and improve appearance, but they are generally adjuncts rather than true cures for hair regrowth.
• PRP appears promising and fairly safe, yet its preparation is highly variable and the evidence in scarring alopecia remains limited, with better results seeming most likely when androgenetic alopecia is also present.
• Exosome-based products are biologically intriguing but remain unsupported by high-quality human data and are not FDA approved for injection, so current clinical use is premature.
• Photobiomodulation is one of the more established device-based options, is generally safe and well tolerated, and may provide modest benefit, but adherence is a major barrier.
• Newer energy-based technologies such as laser, ultrasound, and iontophoresis-based systems are promising but still have insufficient robust evidence, especially for scarring alopecias.
• Hair transplantation can be useful in carefully selected, stable patients, but outcomes are less reliable in frontal fibrosing alopecia and similar scarring disorders.
• Scalp spa and hydrodermabrasion-style services may satisfy patient demand for scalp health and experience, but they are not well standardized and should not be viewed as evidence-based disease treatment.
• Microneedling and other non-invasive delivery methods may have a role, but caution is needed because inflamed or scarring scalps may be at higher risk of irritation or adverse effects.
• Cosmetic management of the face and hairline is an important part of care in scarring alopecia, because treating pigment change, contour loss, and facial aging can meaningfully improve patient satisfaction.
• Overall, the field is moving toward more systematic evidence, but most interventions still require better trials, standardized protocols, and clear safety data before routine endorsement.