Why use glycerin instead of the propylene glycol that is used in most minoxidil preparations?
A. A significant number of patients, as many as 7%, have an adverse skin reaction to propylene glycol. On the other hand, it would be extremely rare to have an adverse reaction to glycerin, which is commonly used in dermatological preparations as a humectant. Humectants attract moisture to one’s skin. Glycerin based soaps are offered at exclusive spas and resorts for this very reason.
