What brand of collagen peptide works well?

Welcome to know about Kangqiaofang blood orange collagen peptide produced by Harvey Biotechnology Beijing Co., Ltd., with molecular weight of 1500-2500 Daltons and absorption rate of 98%. However, the molecular weight of most collagen in the market is 3000 daltons, which is not easily absorbed by human body. The absorption of collagen with molecular weight of 1000 dalton will be unstable, and the cosmetic effect will not be achieved. Know how to choose?