(E)-10-hydroxydec-2-enoic acid is an omega-hydroxy amino acid that is 2-decenoic acid in which one of the hydrogens attached to the terminal carbon is replaced by a hydroxy group and in which the C=C double bond has E configuration. It is a component of royal jelly. It has a role as an animal metabolite and a geroprotector. It is an alpha,beta-unsaturated monocarboxylic acid, a straight-chain fatty acid, a hydroxy monounsaturated fatty acid and an omega-hydroxy-medium-chain fatty acid.