I'm interested in starting some Fish and Flax Seed Oil Capsules supplementation. But I am concerned about toxins and chemicals in the fish oil (mercury, cadmium, dioxin, etc.) in the Fish Oils, and degradation/spoiling of the Flax Seed Oil. What are some tips I can follow to avoid those problems? Refridgeate the Flax Seed Oil Capsules? Does anyone know of a specific company that is better for this sort of thing? Specific company that makes sure there are lower levels of toxins in the Fish Oil capsules? (p.s. I dont have time for liquid flax oil or time to ensure I eat enough fish) Thanks.