Serving size: 1 fish fillet and about 6 spears asparagus Excellent source of Folate, Magnesium, Manganese, Niacin, Phosphorus, Potassium, Protein, Selenium, Thiamin, Vitamin A, Vitamin B6, Vitamin B12, Vitamin C, Vitamin D, Vitamin K Good source of Copper, Fiber, Iron, Pantothenic Acid, Riboflavin, Zinc Fish isn’t the only food with healthy omega-3 fat. Flax, walnuts, and leafy green vegetables have omega-3s also, but they are in a different form (called ALA), which is not nearly as potent as the kind found in fish (EPA and DHA).