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Raw spinach is high in oxalates, which bind to minerals like calcium and prevent the body from absorbing them, says Stefanski. Oxalates can increase the risk of kidney stones in some people, per ...
Klunk explains that while some leafy greens, like spinach, are high in oxalates and can inhibit calcium absorption, kale is a fantastic alternative as it’s naturally lower in oxalates.
Several plant foods such as the root and/or leaves of spinach, rhubarb, and buckwheat are high in oxalic acid and can contribute to the formation of kidney stones in some individuals. Other oxalate-rich plants include fat hen ("lamb's quarters"), sorrel , and several Oxalis species (also sometimes called sorrels).
Boakye says that spinach is one great, bone-supporting food because of its high vitamin K content. As you can see, there are many health benefits of eating spinach regularly.
Some packaged spinach is exposed to radiation to kill any harmful bacteria. The Food and Drug Administration approves of irradiation of spinach leaves up to 4.0 kilograys, having no or only a minor effect on nutrient content. [22] Spinach may be high in cadmium contamination depending on the soil and location where the spinach is grown. [23]
As some of its names signify, it has similar flavour and texture properties to spinach, and is cooked like spinach. Like spinach, it contains oxalates ; its medium to low levels of oxalates need to be removed by blanching the leaves in hot water [ 13 ] for one minute, then rinsing in cold water before cooking.
Members of the spinach family and the brassicas (cabbage, broccoli, brussels sprouts) are high in oxalates, as are sorrel and umbellifers like parsley. [37] The leaves and stems of all species of the genus Chenopodium and related genera of the family Amaranthaceae, which includes quinoa, contain high levels of oxalic acid. [38]
The culprit behind the strange, chalky film is a compound known as oxalic acid. It’s in many foods we eat, but spinach in particular contains especially high amounts, according to Trout.