This is especially unfortunate because a major crop in Africa, grain sorghum, has a somewhat indigestible protein which our bodies have a hard time metabolizing.
The hard, indigestible seed swallowed by the guacharo are found in quantities on the floor and the ledges of the caverns it frequents, where many of them for a time vegetate, the plants thus growing being etiolated from want of light, and, according to travellers, forming a singular feature of the gloomy scene which these places present.
Bee pollen in its pure form consists of mainly indigestible, chewy husks - so the pollen must be processed into a supplement form.
A similar rotation and dislocation occurs in various petrels, in correlation with the indigestible sepia-bills, &c., which these birds swallow in great quantities.
Juicing removes indigestible parts of the beets but preserves their natural sugars and fresh, clean taste.