The goal is to test the safety and efficacy of an EPA-enriched oil made by DuPont. DuPont wishes to corroborate the safety of its novel oil rich in EPA in humans prior to placing such a dietary supplement on the market. The goal of this study is to test this oil at doses of 600 mg and 1800 mg of EPA/day as compared to olive oil placebo and a comparator oil providing 600 mg of DHA/day over a 6 wk period. In a parallel arm study design, 120 healthy adults will be randomized to one of four groups (30 in each group) and studied in both the fasting and post-prandial state.