4-Hydroxyphenylacetic acid is a chemical compound found in olive oil[1] and beer.

[2] 4-Hydroxyphenylacetic acid is obtained by reducing 4-hydroxymandelic acid with elemental phosphorus and iodine.

[3] In industry, 4-hydroxyphenylacetic acid is an intermediate used to synthesize atenolol,[3] 3,4-dihydroxyphenylacetic acid,[4] and coclaurine.