3. Beef Liver
3 ounces (85 grams) of cooked beef liver contains 4.5 milligrams (41 percent DV*)
Beef liver contains a bit more calories, vitamin B12, vitamin B6, vitamin A, zinc and phosphorus compared to other types of liver. Cook it up with some grass-fed butter and onions.
4. Lamb
4 ounces (113 grams) of New Zealand leg of lamb contains 3.6 milligrams of zinc (33 percent DV*)
Lamb is a rich source of many vitamins minerals. In addition to zinc, lamb contains vitamin B12, riboflavin, selenium, niacin, phosphorus and iron.