Supports Heart, Brain, Vision and Joint Health. Enteric Coated and Citrus Flavored (No Fish Burps!). Supports Normal, Healthy Immune Function*Supplementation the Way Nature Intended. MP Core Fish Oil. Essential Fatty Acids, or EFAs, are essential to the human body but can only be found in a few species of fish. Athletes supplement their diets with fish oil because research suggests fish oil's fatty acids can assist with heart function, carbohydrate breakdown and joint health. MP Core Fish Oil is tuned for those of us who hit the gym.