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In this phase 2 study, baricitinib at 2 mg and 4 mg doses significantly improved hair regrowth in adults with alopecia areata and ≥50% scalp hair loss compared to placebo, without new safety concerns, although the small sample size limits the results' generalizability.

This study found that topical calcipotriol lotion resulted in hair regrowth in 59.1% of alopecia areata patients, with better response observed in those with lower serum vitamin D levels.

This study reports that baricitinib was more effective than placebo in promoting hair growth in adults with severe alopecia areata after 36 weeks of treatment in clinical trials.

In this study, traditional treatment for pediatric alopecia areata was highly effective, with all patients achieving full hair regrowth. Tofacitinib and microneedling were less effective but are viable options for severe cases, while adverse effects were mild across all treatments.

This study observed that patients with acute alopecia areata treated with Janus kinase inhibitors achieved a higher rate of complete hair regrowth by week 24 compared to those with non-acute disease, highlighting the benefits of early intervention.