research Stability of Minoxidil in Espumil Foam Base 4 citations, May 2013 in “PubMed” Minoxidil in Espumil foam stays stable for at least 90 days at room temperature.
research Compounded Hair Solutions and Foams Containing Minoxidil: Does the Color Change Impact Stability? August 2023 in “Scientia Pharmaceutica” Color changes in Minoxidil hair products do not affect their effectiveness.