German chemist Wolff pointed out in a paper published in 1870 that spinach has a high iron content and its value can be comparable to that of red meat. This conclusion was written into the encyclopedia. 1929, an American cartoonist named Sike created Popeye Poppie, which was made into a cartoon short film in 1933. Autobots who like spinach often clean up Brutu, the arch-enemy of the giant Han nationality. For decades, the wave school has swept the world.
As soon as the image of poppy came out, the United States fell into the Great Depression. Eating spinach is an endless journey across the ocean to clean up rival lovers, which is undoubtedly like a shot in the arm for the American people who lack meat and spirit. In the 1930 s, sales in the United States increased by 33%. But whether spinach can eat everyone as Iron Man has also been debated for a long time. ?
1934 reported that every100g of spinach contains 53 mg of iron. But this conclusion was quickly corrected. Some scholars have published a paper saying that even dried spinach contains 35 mg of iron per100g, which can absorb up to 20% of the iron in spinach. ? The determination of food ingredients is now a trivial matter. It is generally believed that the average iron content of spinach produced in China is 2.7 mg100g, which is still relatively high in vegetables. However, it is not reliable to expect to eat spinach to supplement iron. Because the iron in food is divided into hemoglobin iron and non-hemoglobin iron, the iron in vegetables, beans, cereals, seaweed, eggs and shellfish is non-hemoglobin iron and should not be absorbed. Take spinach as an example, the absorption rate is only 1%.
In fact, the high efficiency of food iron supplement still comes from animal sources. For example, the iron in beef can be absorbed by more than 20%, which comes from animal viscera. The iron content of pig liver can reach nearly 23 mg per 100 g, which is 10 times that of spinach tea. Just because iron supplementation is unreliable does not mean spinach is useless. In terms of nutritional value, the contents of vitamin C, carotenoids, minerals and coenzyme are still quite high. ?
It should be noted that the biggest disadvantage of spinach is its high oxalic acid content, which can be combined with various minerals, thus affecting its absorption. Spinach leaves have bubble-like hairs, and the tiny fragments formed are easy to absorb particles in the air. You know the environmental pollution. Wash it carefully before eating. It is not enough to supplement iron with spinach, but we can continue to love Popeye and eat spinach like Popeye. ?