Volatile Fatty Acids

Volatile fatty acids (VFAs) represent a class of short-chain organic compounds that contribute pungent, often cheese-like, fermented, or slightly sour aromatics in cannabis. These molecules—including butyric, propionic, and valeric acids—are typically found in trace amounts and arise through microbial activity during plant development and curing. VFAs are rarely the dominant aroma profile but frequently appear as secondary or tertiary notes in strains with aged, funky, or earthy character. Detection of VFAs is often enhanced post-harvest, particularly in buds that undergo extended dry and cure cycles. Breeders and cultivators working with heritage or landrace genetics frequently encounter this volatile class. The presence and intensity of VFAs can vary significantly based on cultivation environment, harvest timing, and post-harvest handling.

Breeders tracking funk, fermentation, or aged-cheese notes in their lines often monitor for VFA expression, though direct genetic selection for these compounds remains poorly mapped. Cultivation and curing protocols appear to have substantial influence on VFA development, making this trait relevant to both genetics work and post-harvest practice standardization.