chylomicrons

Choline is need to make lecithin

There is no definite answer to this question since Lecithin (which is an emulsifier) may be derived form either plant (i.e. soy lecithin) - or animal source. Here in Germany it is specifically written if the lecithin is derived from soy beans (= soy lecithin). If only "lecithin" is written on the product, one has to ensure (f.e. by contacting the producer) whether its derived from animal or plant-source. See more here: http://en.wikipedia.org/wiki/Lecithin

Lecithin can come from two main sources; soy or eggs. Clearly if you have a soy allergy, eating soy lecithin is unwise. Luckily, if lecithin is from soy, it must be labelled "soy lecithin" on the packaging. Eating egg lecithin should present no problems.

I should point out that the vast majority of regular chocolate bars contain soy lecithin rather than egg; lecithin-free chocolate is a specialty product which can sometimes be found in specialist chocolateries or health-food stores.

Lecithin supplements are either sold in a liquid or granular form. Lecithin has a mild light taste that is not offensive when eaten alone.