In enzymology, a hydroxyphenylpyruvate reductase () is an enzyme that catalyzes the chemical reaction
Thus, the two substrates of this enzyme are 3-(4-hydroxyphenyl)lactate and NAD<sup>+</sup>, whereas its 3 products are 3-(4-hydroxyphenyl)pyruvate, NADH, and H<sup>+</sup>.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD<sup>+</sup> or NADP<sup>+</sup> as acceptor. The systematic name of this enzyme class is 4-hydroxyphenyllactate:NAD<sup>+</sup> oxidoreductase. This enzyme is also called HPRP. This enzyme participates in tyrosine metabolism and phenylalanine metabolism.