4-Hydroxyphenylacetic acid-d4
4-Hydroxyphenylacetic acid-d4 is the deuterium labeled 4-Hydroxyphenylacetic acid. 4-hydroxyphenylacetic acid, a major microbiota-derived metabolite of polyphenols, is involved in the antioxidative action. 4-hydroxyphenylacetic acid induces expression of Nrf2.