On a per-calorie basis, which category of food does kale often surpass in terms of Vitamin C content?
Answer
Citrus fruits
Kale demonstrates a powerful nutritional advantage when comparing its Vitamin C contribution relative to its low energy density. Vitamin C, a potent antioxidant essential for immune system support and collagen formation, is highly concentrated in this leafy green. The text explicitly notes that when evaluated on a per-calorie basis, kale frequently exceeds the Vitamin C levels found in traditional fruit sources known for this nutrient, such as citrus fruits. This makes kale an extremely efficient source for obtaining this crucial, heat-sensitive vitamin within a low-calorie dietary framework.
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Kale: Benefits of a superfood powerhouse - Mayo Clinic Health System
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