Soy foods like tofu and tempeh are popular plant-based protein alternatives

Tofu and avocado make the basis of a delicious vegetarian bowl, which even non-vegetarians might appreciate. — Photos: dpa

It is difficult to imagine Asian food without soy, and now, products like soy sauce, tofu and tempeh are winning fans far and wide – and not only among vegetarians and vegans.

Soy beans contain up to 40% protein, although it is harder to digest than animal protein, says Dr Kathrin Hausleiter, a Munich-based doctor and nutritionist.