I take Damage Control Master Formula from Primal Nutrition; in the last six months I've lost about 30 pounds, find myself considerably less hungry than I used to be, and have a lot more energy than I did before. (That all may also be related to the fact that I switched to a high-protein/low-carbs diet at the same time.)

Primal Nutrition also offers Omega 3 supplements, which I also take. I have not had the rancidity problem.

It's all pretty expensive, though.