Omega 3 fatty acids are very important for human metabolism. They are building blocks in our cell membranes, and they keep the outsides of our cells supple. They are also needed in the production of various tissue hormones (the body’s own messenger substances). Good vegan sources of omega 3 fatty acids include walnuts and linseeds, or linseed oil. The German Nutrition Society recommends a daily intake of 250mg per day.