On hemp:
http://www.mindfuleats.com/mindfuleats/2011/10/benefits-of-hemp-seeds-vs-flax.html

"They are a nutritional powerhouse, full of omega-3 and 6, and a complete protein. Hemp seeds have about 3300mg of Omega-3 and 8100mg of omega-6 in 3 tbs (compared to 4050mg of Omega-3 and 800mg Omega-6 in 3 tbs of flax seeds). Omega-3 is harder to get than 6, and though there is more in flax seed, it is all ALA. Some of the omega-3 in hemp seed is the easier to absorb and harder to find SDA. The ratio of omega 3 to 6 is almost ideal in hemp seeds (ideal is considered 1:2 or 1:4. It's actually on the lower range of ideal, which is a bonus because most of us get enough omega-6 already. As for protein, hemp seeds are 33% protein and contain all the essential amino acids and nearly all the amino acids. 3 tbsp contain 11g protein. Hemp also does not appear to contain phytic acid that may reduce nutrient absorption."