Hemp is one of the oldest complete proteins grown by humans. Hemp provides an incredibly rich source of omega-3 and omega-6 in the perfect 3.75:1 ratio. Also, hemp contains GLA which improves skin and hair health. Hemp oil provides a better source of omega-3 and omega-6 than fish oil and without the scare of Mercury poisoning.
Interestingly, the first paper made in China was from hemp fiber. Here is a cool shop that sells various clothing items made from hemp.
Check out this article on hemp by Dr. Andrew Weil.