Amino acids contain an amine (NH2) group and a carboxylic acid (COOH) group, separated by a carbon atom. That means they’ll have both the NH and OH groups that you need for humectant action. Some examples in skincare: glycine, leucine, lysine, and arginine. Peptides and proteins are ...
IngredientsExamplesSuggested concentration (wt%) Emollient [HLB value]Synthetic oils: Caprylic/Capric triglyceride [5], C12-C15alkyl benzoate [13]; Natural oils: Sunflower oil [7], sweet almond oil [7], coconut oil [8]; Silicone oils: Cyclomethicone [5], dimethicone [5]10-40 ...