Abstract: An object is to provide a synthetic culture medium not containing animal-derived components. In particular, an object is to provide a culture medium not containing animal-derived components but containing peptides that promote cell growth or contribute to promotion of protein production. A culture medium containing a peptide selected from the group consisting of Gly-Glu-Lys (GEK), Asp-Gly-Pro (DGP), Ala-Gly-Lys (AGK), Gly-Pro-Pro (GPP), Gly-Gly-Pro (GGP), Ala-Glu-Lys (AEK), Ala-Gly-Gly (AGG), Ala-Ser-Asn (ASN), and Glu-Gly-Lys (EGK) is provided.

Abstract: [Problem to be Solved by the Invention] The present invention provides a novel functional supplement/dietary supplement that is inexpensive, abundant, easy to obtain and consume, is capable of preventing and improving voiding dysfunction, and has few side effects. [Solution] In accordance with one aspect of the present invention, there is provided a functional supplement for preventing or improving voiding dysfunction, characterized by containing a seaweed extract extracted from seaweed using an alcohol solution or water. The voiding dysfunction is caused by benign prostatic hyperplasia or overactive bladder, and the seaweed is one seaweed selected from the group consisting of aosa, aonori, kombu, arame, kajime, wakame, mekabu, hijiki, mozuku, tengusa, dulse, iwanori, and akamoku, with akamoku being especially preferable.