Hi these un soaked contain enzyme inhibitors. So when you try to digest them your body has a difficult time it may not be like meat sitting heavy because that needs lots of acid. But they do need quite a bit of work from enzymes. I believe if they are soaked or *cooked* these are broken down. I highlight cooked because I am not 100% on that one. The enzyme inhibitors are there to put of predators and to preserve the seed so months or years. This is why some people just get nuts and seeds going through them and people say they are hard to digest but its not quite like meat. I would honestly be careful eating lots though, you may end up with issues of copper building up in organs like the liver and brain. Have a read of this and keep an eye out for future symptoms if you don't have them already.
http://www.drlwilson.com/articles/copper_toxicity_syndrome.htm

Phil