Soy Lecithin

So one of the reasons I haven’t indulged in the chocolate chips that are still left over from the package Divvies sent is because they have soy lecithin, a soy by-product. Is soy lecithin really soy-like? Would it upset my tummy like soy milk does? Luckily, I'm not allergic to soy just a bit intolerant and after reading this fact sheet and this article it looks like either the lecithin has no proteins that cause the tummy distress or you just have to try to find out. Hmmmm.