Participants with the GG CD36 genotype were more likely to be fat discriminators than were carriers of the A allele (P < 0.05). Polymorphisms of FFAR1, FFAR3, or CA6 were not related to fat discrimination. Fat discrimination was not associated with fat intake and polymorphisms of CD36, FFAR1, FFAR4, or CA6 were not associated with frequency of HF food consumption. The gene discussed is FFAR4; the disease is hydrops fetalis.