Kale

Kale is a cruciferous vegetable and one of the vegetables grown from the species Brassica oleracea. Broccoli and cauliflower are also members. Kale is one of the most nutrient-dense greens available, high in vitamins A, K, and C. It's also high in antioxidants, with up to 2.7 mmol per 3.5 oz (100 grams). Red kale cultivars such as redbor and red Russian kale, on the other hand, may have nearly twice as much — up to 4.1 mmol of antioxidants per 3.5 ounces.

This is due to the fact that red kale contains higher anthocyanin antioxidants as well as various other antioxidants that give it its brilliant color. Kale is also a good plant-based supply of calcium, which is a crucial mineral for bone health and other cellular activities.