Important brain nutrients

Several essential nutrients are not available from plants or fungi. Creatine, carnosine, taurine, EPA and DHA omega-3, haem iron and vitamins B12 and D3 generally only occur naturally in foods from animal products.

The nutrients found in vegan foods are minimal. To get the minimum amount of vitamin B6 each day from the richest plant sources, you'd have to eat about five cups worth of potatoes.