In recent years, with the promotion and popularization of health science knowledge, many people are aware that a lack of certain trace elements in the human body can lead to disease and can be supplemented and treated in a timely manner. However, few people understand the principle that while supplementing trace elements, rationally pairing them with certain vitamins can achieve twice the result with half the effort. This is because certain vitamins and minerals have a synergistic effect. The following lists the relationships between different vitamins and minerals, as well as foods rich in them.
Vitamin C and Iron Vitamin C can reduce trivalent iron to divalent iron in the intestines, promoting iron absorption. Foods rich in vitamin C should be consumed with foods rich in iron to enhance iron absorption, such as stir-fried pork liver with bell peppers. Recent experimental results have shown that iron supplements with vitamin C can restore indicators in severely anemic rats, including body weight, hemoglobin, red blood cell count, hematocrit, serum iron, and free erythrocyte protoporphyrin, indicating that iron with vitamin C has significant health and therapeutic effects for improving iron-deficiency anemia.
Foods rich in iron mainly include black fungus, animal liver, lean pork, sesame paste, longan, soybeans, red beans, and mung beans. Foods rich in vitamin C include coriander, bell peppers, cauliflower, bitter gourd, amaranth, rape, fresh jujubes, kiwis, strawberries, oranges, grapes, and mangoes.
Vitamin E and Selenium Vitamin E is an antioxidant that promotes the absorption and utilization of selenium and enhances its antioxidant effect, so vitamin E and selenium have a synergistic effect in antioxidant activities. As the body ages, the activity of superoxide dismutase (SOD) decreases, and lipid peroxides accumulate. Vitamin E is fat-soluble and can enter the lipid layer of cell membranes, capturing free radicals before they attack polyunsaturated fatty acids and blocking the oxidation process. Vitamin E can maintain the active form of selenium in the body, inhibit its excretion, prevent the auto-oxidation of membrane lipids, and reduce peroxide production. Experiments have found that joint supplementation of selenium and vitamin E significantly increases SOD activity in human tissues, which proves that the combination of vitamin E and selenium has a synergistic effect.
Foods rich in selenium include marine fish, animal kidneys, and meat. In addition, garlic, cabbage, and wheat also contain relatively high levels of selenium. Foods rich in vitamin E include sesame seeds, edible oils, eggs, legumes, grains, and nuts.
Vitamin A and Zinc Vitamin A is mainly stored in the animal liver. When the body needs it, the liver hydrolyzes retinyl esters into vitamin A, which is then transported through the blood to various tissues to exert its physiological effects. The vitamin A reductase in the retina and liver is a zinc-containing alcohol dehydrogenase involved in the synthesis of vitamin A. When zinc is deficient, the activity of this enzyme decreases, vitamin A in the liver cannot be mobilized, and the synthesis of vitamin transport proteins is impaired. Research shows that there is a synergistic relationship between zinc and vitamin A. In animals deficient in zinc, the vitamin A level in their serum is low; after zinc supplementation, the serum vitamin A level can rise to normal. Zinc is an important metal ion in vitamin A metabolism, participating in maintaining the normal morphology and visual function of eye tissues. Zinc deficiency can cause abnormal function of retinal rods and cones.
Foods rich in vitamin A include animal liver, cod liver oil, dairy products, poultry eggs, and carrots, pumpkins, sweet potatoes, chili peppers, spinach, broccoli, mangoes, persimmons, and apricots. Foods rich in zinc include oysters, dark plum, sausage, beef jerky, braised beef, fresh scallops, cheese, dried squid, and duck liver.