Think of oil and vinegar dressing: it always wants to separate. If you blend it with a touch of an emulsifier (egg yolk, lecithin, etc.), it will help the dressing stay together and keep it from âbreakingâ (separating). Sunflower lecithin is produced (or harvested) as a byproduct of the sunflower oil extraction.It is also used as a healthy supplement due to its high concentration of choline (also found in eggs and liver).It is found naturally in sunflower seeds, and lecithin itself is found naturally in the body (including the brain!).t is also used as a healthy supplement due to its high concentration of choline (also found in eggs and liver). It is found naturally in sunflower seeds, and lecithin itself is found naturally in the body (including the brain!).