Bentsen et al. (1) recently tested the hypothesis that red blood cell (RBC) polyunsaturated fatty acids (PUFAs) are bimodally distributed in schizophrenia and related psychoses. In their study, sums of total, ?3, and ?6 PUFA concentrations were indeed bimodally distributed, as opposed to one normal distribution for sums of saturated fatty acids (SFAs) and monounsaturated fatty acids (MUFAs).