I've been reading a lot of negative things online about using soy - being genetically modified and having high amounts of pesticides. (Source: http://www.mercola.com/article/soy/avoid_soy.htm)
I'm lactose-intolerant so milk-derived protein usually upsets my stomach pretty bad, so I also have to avoid whey protein.
This weekend, I discovered "Pea Protein" in the organic section of our local grocery store.
Pea Protein??? Sounds gross..right?
It's not - it actually tastes good - is organic and although slightly more expensive than the protein powder you can find at Wal-Mart, I think it's worth it. Here are some pics (including nutritional info) of the kind I purchased and am using: