Peptides collagen iʻahuki ʻia mai nā iʻa kai. ʻAʻole haumia me kahi ʻono maikaʻi, a ʻoi aku ka maopopo o ka hopena. He waiwai ia i ka meaʻai a he nui ka solubility i ka wai.
ʻO collagen bovine me ke kaupaona mole ma mua o 800 daltons, he peptide oligomer, ka mea e hana ma ke kino o ke kanaka a i ʻole ka ʻili a loaʻa ka permeability maikaʻi a me ka hiki ke komo.