Read more Doppelherz Lecithin Nowadays, work, sports and normal daily stress set special requirements for our body. It requires thinking, mental dexterity, ability to learn, good memory, strong nerves and perseverance. Our body depends on an adequate supply of nutrients for health and well-being. Lecithin is a phospholipid and is part of brain membranes and nerve cells. Water-soluble B vitamins contribute to numerous processes in the body. Our bodies cannot store these vitamins for long. Therefore, they should be consumed sufficiently and regularly through food.