28 citations
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September 2019 in “International Journal of Nanomedicine” Minoxidil nanoparticles can potentially be a more effective treatment for hair growth than current treatments.
7 citations
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February 2020 in “Analytical and Bioanalytical Chemistry” 
A new peptide, murikal/SPR4, was found to significantly increase hair growth in mice, and its liposomal topical formulations enhanced hair growth more than commercial products. However, results on human scalp skin were unclear, needing more tests.
January 2022 in “International review of movement disorders” Cannabinoid and steroid-based drugs could be new treatments for Tourette syndrome, but more research is needed to confirm their effectiveness and safety.
March 2023 in “Reactions Weekly” 
July 2024 in “JAAD Case Reports” Corticosteroid injections for hair loss may cause eye problems, so caution is needed.
5 citations
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July 2022 in “PubMed” Hair dyes, shampoos, and conditioners often cause scalp allergies due to common allergens like p-phenylenediamine and nickel.
October 1890 in “Science” Pilocarpin can cause hair regrowth and color change in some cases but not in others, and it may have side effects in animals.
December 2025 in “Journal of Nanobiotechnology” The new microneedle system promotes hair growth by improving the hair follicle environment.
6 citations
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November 1990 in “DICP”