Spinach is known as a rich source of iron and calcium. According to the United State ofDepartment of Agriculture, a 180 gram serving of boiled spinach contains 6.43 mg of iron, whereas one 6 oz. (170 gram) ground hamburger patty contains at most 4.42 mg. Thus spinach does contain a relatively high level of iron, compared to other vegetable and meat sources.
The iron in spinach is poorly absorbed by the body unless eaten with calcium.
Spinach also has a high calcium content.
Spinach is an excellent source of vitamin K, vitamin A, manganese, folate, magnesium, iron, vitamin C, vitamin B2, calcium, potassium, and vitamin B6. It is a very good source of dietary fiber, copper, protein, phosphorus, zinc and vitamin E. In addition, it is a good source of omega-3 and fatty acids.