Dark vegetables have high nutritional value.
Foliage is the main source of calcium, carotene, iron, riboflavin, ascorbic acid and cellulose in our diet, and it is almost a must-have dish for everyone.
Generally speaking, the darker the leaves of leafy vegetables, the more calcium, iron, carotene, vitamin B2 and vitamin C are contained, such as rapeseed (green vegetables), black cabbage (collapsed vegetables), shepherd's purse, potherb mustard (snow red) and other leafy vegetables. They contain140 ~ 420mg of calcium,1.4 ~ 6.3mg of iron, 3.05 ~ 3.20mg of carotene and 0.14 ~1. Far more than light-colored Chinese cabbage (bean sprouts), Chinese cabbage only contains 4 1~6 1 mg of calcium, 0.5~0.6 mg of iron, 0.4 mg of carotene, 0.04 mg of vitamin B2 per100g. The thinner the leaves of leafy vegetables, the higher the nutrients.