(1) Vitamin D (cod liver oil) has biological activity and can promote the absorption of calcium

(2) Exposure to the sun can help supplement calcium, such as shrimp skin, hairy crabs, green vegetables, Milk, soybeans, soft tofu, green beans, fried pumpkin seeds, pork floss, etc. contain more calcium

(3) Some vegetables, such as spinach, bamboo shoots, amaranth, edamame, wild rice, onions, grass heads, etc., contain Oxalate, which can combine with calcium to form calcium oxalate, affects calcium absorption. Therefore, before cooking these vegetables, they should be scalded in boiling water to remove the oxalic acid.