Provided is a technique for reducing unpleasant odors of a liquid composition for oral use including a collagen peptide having a low molecular weight, in particular bitterness and odors of culture. The present invention pertains to a liquid composition for oral use containing: a collagen peptide having an average molecular weight of 300 to 2000; and welan gum.本發明係提供減低包含低分子量的膠原蛋白胜肽之液狀經口用組成物的令人不愉快的臭味,特別是似培養基的臭味及苦味之技術。本發明係關於包含平均分子量為300~2000的膠原蛋白胜肽及威蘭膠(welan gum)之液狀經口用組成物。