- Beans. Grotto says all dry beans, including lentils, are incredibly nutrient-dense, and the best among them is the kidney bean.
- Yogurt or Kiefer. Plain, low-fat yogurt and kiefer, which is like a liquid yogurt, are full of healthy probiotics, vitamins and minerals.
- Beef Liver.
- Salmon.
- Mushrooms.
- Lobster.
- Soybeans.
- Oysters.