Iron supplements are a class of drugs primarily used to treat iron-deficiency anemia. Pregnant women, women with heavy menstrual periods, and individuals with malnutrition also require small amounts of iron supplementation to prevent anemia. Common types include ferrous sulfate tablets, ferrous gluconate tablets, and iron dextran injection.
When taken orally, whether organic or inorganic, iron supplements must be converted into inorganic ferrous salts in the digestive tract before they can be absorbed by the body. The absorption of iron supplements is unstable and can be easily affected by dietary factors. Therefore, it is important to pay attention to dietary restrictions when taking oral iron supplements.
Soy milk is rich in amino acids and can react with iron supplements to form a special chelate that cannot be absorbed by the body, rendering the iron supplement ineffective. There should be an interval of at least two hours between taking soy milk and iron supplements.
Foods high in phosphorus can easily react with iron supplements to form ferrous phosphate, which forms a precipitate in the body and is not absorbed. Foods high in phosphorus include peanuts, melon seeds and other nuts, as well as lean meat, poultry, eggs, fish, and legumes.
Foods high in tannins can react with iron supplements to form tannate iron salt precipitates, affecting the absorption of iron ions. Foods high in tannins mainly include tea, persimmons, hawthorn, pomegranates, and peaches.
In the intestines, iron can bind with the calcium salts and phosphates in milk to form insoluble compound precipitates, thereby affecting iron absorption and significantly reducing the therapeutic effect.
High-fat foods, such as fatty meat, can inhibit the secretion of gastric acid. In the absence of sufficient gastric acid, the absorption of iron supplements is reduced.
Alkaline foods can increase the alkalinity of the blood, affecting the amount and pH of gastric acid in the stomach, which is also unfavorable for the absorption of iron supplements. Such foods include kelp, carrots, soda crackers, cucumbers, and sweet potatoes.
Therefore, it is best to take iron supplements between meals. At the same time, you can also eat more fresh vegetables and fruits rich in vitamin C, such as cherries, oranges, strawberries, cauliflower, and amaranth, to improve the absorption rate of iron supplements.