Caffeine
Energizes the follicle, extends the active growth (anagen) phase, and curbs shedding. The rare cosmetic active studied head-to-head against minoxidil.
Caffeine vs minoxidil, head to head
Statistically tied with the leading drug on growth phase (95% CI -2.72 to 4.89).
▸What the studies measured
- Randomized multicenter trial, 210 men with AGA, 6 months: 0.2% caffeine raised the anagen ratio +10.59% vs +11.68% for 5% minoxidil, statistically noninferior (95% CI -2.72 to 4.89). Caffeine-1
- Caffeine shampoo studies: 73% reduction in premature hair loss vs 33% with control shampoo; satisfaction 85% vs 36%. Caffeine-2
- Ex vivo human follicles: caffeine reversed testosterone-induced growth suppression and stimulated hair-shaft elongation at 10-50 µg/mL. Caffeine-2
- Follicular penetration: reached ~200 µm depth within 2 minutes and remained detectable for 24+ hours. Caffeine-4 / Caffeine-5
▸References & DOIs
- Dhurat R, et al. An open-label randomized multicenter study assessing the noninferiority of a caffeine-based topical liquid 0.2% versus minoxidil 5% in male AGA. Skin Pharmacol Physiol. 2017;30(6):298-305. doi:10.1159/000481141
- Völker JM, et al. Caffeine and its pharmacological benefits in the management of androgenetic alopecia: a review. Skin Pharmacol Physiol. 2020;33(3):93-109. doi:10.1159/000508228
- Suchonwanit P, et al. The use of phosphodiesterase inhibitors for the treatment of alopecia. J Dermatolog Treat. 2019;30(7):659-666. doi:10.1080/09546634.2019.1592097
- Otberg N, et al. Follicular penetration of topically applied caffeine via a shampoo formulation. Skin Pharmacol Physiol. 2007;20(4):195-198. doi:10.1159/000101389
- Lademann J, et al. Analysis of the penetration of a caffeine-containing shampoo into the hair follicles by in vivo laser scanning microscopy. Laser Phys. 2010;20(11):2070-2073. doi:10.1134/s1054660x10030102









