Answer first
Hyaluronic acid is a humectant: it holds water and helps skin feel hydrated. On the scalp it can help with a dry, tight feeling. Reviews describe its hydrating role in skin care; it is not a hair-growth ingredient, and Folli-Care uses it for scalp comfort.
How it works
It binds water at the skin's surface, which can make skin feel softer and less tight.
What it doesn't do
Research on hyaluronic acid focuses on hydration and skin, not on growing hair.
Questions
Is it suitable for oily scalps?
It is light and water-based; see our post on oily scalps.
Can it irritate?
It is generally well tolerated, but patch-test if your skin is sensitive.
Studies mentioned
These studies looked at ingredients or general approaches. None of them tested our treatments or products, so they are background, not proof.
- Bravo B et al. (2022). Benefits of topical hyaluronic acid for skin quality and signs of skin aging: From literature review to clinical evidence. Dermatol Ther 35(12):e15903.Review + RCT summary. Topical hyaluronic acid is a hygroscopic, well-tolerated cosmeceutical ingredient used for skin hydration and rejuvenation, supported by multiple clinical studies.PubMed 36200921doi:10.1111/dth.15903
- Bukhari SNA et al. (2018). Hyaluronic acid, a promising skin rejuvenating biomedicine: A review of recent updates and pre-clinical and clinical investigations on cosmetic and nutricosmetic effects. Int J Biol Macromol 120(Pt B):1682-1695.Review. Hyaluronic acid formulations improve skin hydration and elasticity in cosmetic and clinical studies; HA is involved in skin repair and wound healing.PubMed 30287361doi:10.1016/j.ijbiomac.2018.09.188