I am planning to include soy lecithin in my recipe as a source of choline. I cannot figure out for sure how much lecithin I need to meet the choline rda. I have read that lecithin is 13% choline. If I have my math correct, I would only need 5 grams lecithin to get 650 mg of choline. However, the USDA database lists 15 grams soybean lecithin as have 450 mg choline. I tend to trust the USDA more than myself but am not sure. The diy.soylent ingredient database is incorrect on lecithin because whoever made the entry used the nutritiondata information on a different lecithin product. The supplier (nuts.com) says one tablespoon has 50% of the choline rda. I have not yet purchased it though so i cannot use this measure as reference. I would really appreciate it if someone could help by either pointing out my mistake or shedding light on the proper amount.
The number I’ve been using is 37.8mg of choline per 1g of lecithin. I don’t remember the source I used, though.