Prebiotics in ancient Indian diets
Gut microflora co-evolved with the human evolution, performing health-promoting functions and protection from the enteric pathogens. The long association of the microflora sustained through ages, which in the light of new research, needs specific nutrients that are not required by the humans. The present article revisits the ancient foods and crops, their availability during different prehistoric times and their contribution in maintaining the gut flora and accrual of the beneficial effects. Although the concept of prebiotics is new, the ancient diet components contained the molecules or precursors of the prebiotics.
http://www.ias.ac.in/currsci/10jul2011/43.pdf