Low-level laser therapy (LLLT) is a painless, non-invasive method using low-intensity red light wavelengths (typically 630-670 nm), thought to support hair growth by stimulating mitochondrial activity in follicular cells.
Delivery Methods
Applied via professional in-clinic devices or at-home laser caps, combs, and bands, typically in 15-30 minute sessions several times per week.
Evidence Base
Head-to-head studies generally find PRP produces greater improvement in hair thickness and density than LLLT alone; however, combining LLLT with PRP has been shown to outperform PRP alone. It is considered a reasonable option with a favorable risk-benefit ratio for both androgenetic alopecia and alopecia areata.
Who it suits: Because it's non-invasive, LLLT is an appealing supportive option for patients who can't use medications or want to avoid their side effects — but expectations should stay modest.