What's better: laser or phototherapy?

In a recent controlled study researchers assessed effect and safety of different laser and phototherapy treatments, such as excimer laser/light, narrowband UVB, UVA and PUVA.

No significant difference was found between 308-nm excimer laser and its cheaper alternative NB-UVB in the treatment of vitiligo. Laser may produce slightly faster re-pigmentation compared to UVB, while UVA and PUVA are not recommended due to potential side effects. 

Take note that leukotrichia (depigmented or white hairs inside the vitiligous area) are often correlated with lower efficacy of phototherapy treatments because of of a deficient melanocyte reservoir (PubMed). 

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