Flaxseeds, sometimes called linseeds, are small, brown, tan or golden-colored seeds. In fact, lined or”Flax Seed” are different names for the same seed, Flaxseeds are a great source of dietary fiber; minerals like manganese thiamine and magnesium: and plant-based protein. Rax is one of the richest sources of plant-based omega-3 fatty acids, called alpha-linolenic acid (or ALA). Another unique fact about exceeds is that they are the No. 1 source of lignans in the human diets; flaxseed contains about seven times as many lignans as the closest runner-up, sesame seeds.