Optimal Microneedle Length for Hair Regrowth in Hair Cycle Arrest (Alopecia X) in Six Dogs

December 2023 in “ Veterinary dermatology ”

Yeong‐Hun Kang, Min‐Sun Kim, Soon‐Beom Kang, Jae‐Eun Hyun, Cheol‐Yong Hwang

microneedle hair regrowth hair cycle arrest alopecia X pruritus alopecia relapse itching hair loss

TLDR Longer 3 mm needles were most effective for dog hair regrowth, but hair loss often returned and some dogs felt itchy.

The study investigated the optimal microneedle length for hair regrowth in six dogs with hair cycle arrest (HCA). Three needle lengths (1 mm, 2 mm, and 3 mm) were tested on different sections of alopecic sites. Results showed that 3 mm needles led to hair regrowth in all treated sections after 3 months, while 2 mm needles were less effective, and 1 mm needles showed minimal efficacy. Two dogs experienced transient pruritus, and five dogs had recurrent hair loss between 5 and 16 months. The study concluded that longer needles are more effective for stimulating hair regrowth in dogs with HCA, although alopecia relapse and minor pruritus are potential side effects.

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