All the elements needed by human body are supplemented from food. Since the types and quantities of elements contained in various foods are not exactly the same, so in the usual diet, to achieve a combination of coarse and fine grains and meat and vegetarian mix, not partial food, not picky food, can basically meet the human body’s need for various elements. On the contrary, can cause the lack of certain elements. Iron deficiency: eat more black fungus, seaweed, animal liver, cauliflower, blood tofu, mushrooms, rapeseed, roasted bamboo, yeast, sesame, clams, etc. Zinc deficiency: eat more fish, oysters, lean pork, beef, mutton, animal liver and kidney, eggs, cocoa, dairy products, cheese, peanuts, sesame, soybean products, walnuts, brown rice, coarse flour, etc. Severe cases can take zinc supplement products. Magnesium deficiency: can eat more kelp, nori, sesame, soybeans, brown rice, corn, wheat, spinach, mustard, cauliflower, black dates, bananas, pineapple, etc. Iodine deficiency: can eat more kelp, nori, sea fish, sea shrimp, etc.