Foods rich in oxalic acid include spinach, beans, grapes, cocoa, tea, oranges, tomatoes, potatoes, plums, bamboo shoots, beets, celery, chocolate, green peppers, parsley, strawberries and cabbage.
Oxalic acid is a metabolite of organisms, widely distributed in plants, animals and fungi, and plays different functions in different life forms. It is found that 100 plants are rich in oxalic acid, especially spinach, amaranth, beet, purslane, taro, sweet potato and rhubarb. Oxalic acid can reduce the bioavailability of mineral elements, and easily form calcium oxalate with calcium ions in human body, leading to kidney calculi, so oxalic acid is often considered as an antagonist for the absorption and utilization of mineral elements.
Harm of oxalic acid and matters needing attention in use;
1. Oxalic acid is not easy to be oxidized and decomposed in human body, and the products formed after metabolism are acidic substances. Eating too much will lead to imbalance of pH and poisoning in human body.
2. Moreover, if oxalic acid meets calcium and zinc in the human body, it will generate calcium oxalate and zinc oxalate, which are not easy to absorb and excrete, affecting the absorption of calcium and zinc.
Children need a lot of calcium and zinc for their growth and development. If the body lacks calcium and zinc, it will not only lead to bone and tooth dysplasia, but also affect intellectual development.
4. Excessive intake of oxalic acid can also cause stones.