One, people with kidney stones.
Because spinach contains a large amount of potassium oxalate, oxalate ions into the body after electrolysis will precipitate calcium ions, not only prevent the body from absorbing calcium, but also easy to generate calcium oxalate stones, increasing the chance of kidney stones.
Experts suggest first spinach in boiling water to cook a little, to be dissolved in water potassium oxalate, and then discard the soup only eat vegetables.
Two, the elderly, infants, pregnant women or people with calcium deficiency.
Because the elderly, infants and young children, pregnant women in urgent need of calcium or are taking calcium tablets treatment (such as chondromalacia, tuberculosis calcium deficiency patients), experts recommend taking calcium tablets before and after 2 hours do not eat spinach.
Three, patients with diarrhea.
Spinach is rich in fiber, the role of lubrication of the intestinal tract, diarrhea patients should not eat.