The molecular weight of mandelic acid is 152.1 daltons which is larger than other alpha hydroxy acids (glycolic acid is 76.0 daltons, for example).
This larger size allows mandelic acid to penetrate the skin more slowly which in turn makes it very gentle and suitable for all skin types including the most sensitive skin. The Ordinary Mandelic Acid 10% + Hyaluronic Acid.Contradictions: This formula contains Direct Acids. For best results, please avoid using the following ingredients in the same regimen:Copper PeptidesPeptidesOther direct acidsEUK 134100% Niacinamide PowderIngredients: Propanediol, Aqua (Water), Mandelic Acid, Glycerin, Dimethyl Isosorbide, Sodium Hyaluronate Crosspolymer, Tasmannia Lanceolata Fruit/Leaf Extract, Pentylene Glycol, Polysorbate 20, Sodium Hydroxide, Ethylhexylglycerin, 1,2-Hexanediol, Caprylyl Glycol.