No difference, just a difference in semantics. The phrase "collagen peptide" is based on the final product, which is a polypeptide derived from collagen; and "hydrolyzed collagen" comes from the hydrolysis process, that is, the method of preparing collagen peptides.
The production of collagen powder wholesale usually adopts two methods: hydrolysis and enzymatic hydrolysis. Enzymatic hydrolysis is safer than the method of hydrolyzing gelatin.
The raw material is healthy animal skins.
Good collagen powder bulk has no fishy smell, is hygienic and safe, and has good water solubility and good fluidity.
Good collagen wholesale contains high content of effective amino acids, such as (hydroxy)proline, glycine, lysine, etc.
Good collagen bulk powder should not contain fat, sugar, purine, cholesterol, preservatives and other substances.