I think Mark has written about both soy lecithin and sunflower seed oil. Soy lethicin is found in a lot of dark chocolate products and primals loooove their dark chocolate. I don't have time to find the articles, and can't even quote, other than to say that Mark thinks soy lethicin is ok and sunflower seed isn't anywhere near as bad as corn oil, vegetable oil, canola oil, or peanut oil.
If you have time, you could put these in the forum search engine. But I think you'll be fine