Substances can be absorbed through human hair and the scalp.
Is it true that substances can be absorbed through human hair and the scalp?
Yes. Substantial scientific evidence demonstrates that substances can penetrate both the skin barrier and be absorbed via hair follicles and the scalp.
Verdict: SUPPORTED · 3 sources for, 0 against · Last checked
The retrieved literature documents trans-appendage absorption routes through the skin, specifically noting that hair follicles act as significant entry points and targets for topically applied substances like caffeine and therapeutic agents on the scalp.
Get citation
K, B., P, F., Z, U., I, B., & L, J. (2024). Recent Approaches for the Topical Treatment of Psoriasis Using Nanoparticles.. doi.org. https://doi.org/10.3390/pharmaceutics16040449
See more details
Get citation
E, S. & R, S. (2025). Caffeine as an Active Molecule in Cosmetic Products for Hair Loss: Its Mechanisms of Action in the Context of Hair Physiology and Pathology.. doi.org. https://doi.org/10.3390/molecules30010167
Get citation
M, G., Z, J., Z, Y., T, C., W, H., C, Z., J, J., G, Q., C, W., J, C., C, L., & T, P. (2026). Microneedle technology integrated with diverse therapeutic modalities for hair regrowth in alopecia.. doi.org. https://doi.org/10.1016/j.apsb.2026.03.006
What does the evidence say?
The retrieved literature documents trans-appendage absorption routes through the skin, specifically noting that hair follicles act as significant entry points and targets for topically applied substances like caffeine and therapeutic agents on the scalp.
Receipt History
Challenge the receipt
Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.
Terms · Privacy · How verdicts work