Fartapeutic index

-(noun)-with ref to sugar-alcohol-based artificial sweeteners; The difference in quantity between enough to result in the proband's uncontrolled production of foghorn-volumed flatulence, and the quantity which results in his making fizzy gravy.

Fartapeutic index of erythritol-high; FI of maltitol- dangerously low. Empirical data re the latter are published within the Amazon customer reviews of "sugar free jelly bears", the conclusion of the most authoritative of which reads "Jesus, my poor ringpiece".