Evidence supporting the use of: Tall Kale
For the health condition: Calcium Deficiency

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Tall Kale is recognized for its high calcium content, which provides a scientific basis for its use in supporting or preventing calcium deficiency. Kale, including tall cultivars, is one of the leafy green vegetables that contains significant amounts of bioavailable calcium. According to USDA data, one cup of raw kale provides approximately 100 mg of calcium, and it also contains nutrients such as vitamin K, which support bone health. Several studies have shown that the calcium in kale is well absorbed, with absorption rates comparable to or better than that of dairy products. For example, a study published in the "American Journal of Clinical Nutrition" (2002) found that the fractional calcium absorption from kale was 40.9%, similar to that from milk. While kale can contribute to daily calcium intake, scientific evidence does not support its exclusive use as a treatment for clinically diagnosed calcium deficiency; rather, it is valued as a part of a balanced diet to help meet calcium requirements. Unlike some other leafy greens, kale is low in oxalates, substances that can inhibit calcium absorption. There is no strong tradition specifically associating tall kale with calcium deficiency, but its use as a nutritious food is well established. Thus, the use of tall kale for supporting calcium levels is scientifically justified as a dietary source rather than as a primary treatment for deficiency.

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