Both Jerusalem and globe artichokes contain inulin, a fructose-based indigestible starch which has prebiotic effects linked to several health benefits. Inulin ferments in the large intestine, stimulating the selective growth of beneficial gut bacteria such as bifidobacteria and lactobacilli.
Ramnani P, Gaudier E, Bingham M, van Bruggen P, Tuohy KM, Gibson GR. (2010). Prebiotic effect of fruit and vegetable shots containing Jerusalem artichoke inulin: a human intervention study. Br J Nutr. 104(2):233-40
Costabile A, Kolida S, Klinder A, Gietl E, Bäuerlein M, Frohberg C, Landschütze V, Gibson GR. (2010). A double-blind, placebo-controlled, cross-over study to establish the bifidogenic effect of a very-long-chain inulin extracted from globe artichoke (Cynara scolymus) in healthy human subjects.Br J Nutr. 104(7):1007-17.