label: S-(hydroxymethyl)glutathione dehydrogenase [NAD(P)+] activity
label_lc: s-(hydroxymethyl)glutathione dehydrogenase [nad(p)+] activity
description: "Catalysis of the reaction: S-(hydroxymethyl)glutathione + NAD(P)+ = S-formylglutathione + NAD(P)H + H+."