Mark. I just noticed that one of my supplements contains soy lecithin. I know itâs a by product of the soy after the oil has been extracted and according to the information Iâve attached, it is actually not very good for you, despite previous claims that it is excellent for many things. think we pick our battles with Paleo, and sometimes soy lecithin wins. For instance, when I was a chocolate eater, before I realized that it gave me acne and ocular migraines, I didnât give a damn whether my Almond Sea Salt Chocolove had soy lecithin in it.