in the food store i work in we sell the fish/salmon oil, flax seed, and hemp oil products. and when we talk to customers we recommend the fish oil more often, though i would say the hemp seed oil would be a close second. i personally believe that the fish oil, specifically salmon has a higher concentration of the Omega 3,6, and 9's. but hemp seed oil, its crazy stuff, very versitile, it is a very healthy seed from the hemp plant.