Fig 4. Percentage increase of perceived intensity ratings by the subjects in which L-Arg (5 mmol/L) was effective according to PROP taster status or polymorphisms of TAS2R38, CD36 (rs1761667) and OBPIIa (rs2590498) genes.

n = 33. * = Significant difference with respect to the corresponding value assessed before supplementation (p = 0.019; Fisher’s LSD test subsequent to repeated-measures ANOVA).