For protection of the heart, take lecithin. The action of lecithin on the heart is the most important of all its proved benefits. It achieved its popularity initially in this area. Cholesterol is a fatty substance that tends to collect in the walls of the arteries and veins, thus narrowing them. This may eventually lead to a fatal blood clot. Scientific studies have shown that lecithin has the ability to break up cholesterol into small particles which can be easily handled by the system. With sufficient intake of lecithin, cholesterol cannot build up against the walls of the arteries and veins.