noun. In chem., combination With the radical hydroxyl, HO.

noun. The introduction of a hydroxyl group into a molecule, especially by the replacement of a hydrogen atom

"Through a process known as hydroxylation, beta-carotene is converted into other carotenoids that can cut the amount of pro-vitamin A that is created through digestion in half, or eliminate it altogether."

ATV  acetylation  amines  deliuerie  deodorization