Name Ingredients:
Propylene glycol is a carrier ingredient used in a number of hair loss treatments. It is used due to its ability to moisturize and improve absorption of active ingredients into the scalp.
Key insights:
- The ex vivo evidence suggests that propylene glycol can improve the penetration of drugs through the skin.
- Propylene glycol may cause allergic contact dermatitis in some people; however, this is an uncommon side effect. In a retrospective study of 6761 patients, 9 had a relevant positive reaction to propylene glycol.
- Because propylene glycol is a humectant (meaning that it locks in moisture), it may be more beneficial for those with dry scalps.
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