18) Turnip Greens
These are also dark leafy greens like spinach, and the nutritional profile is similar to this food. They are commonly discarded but think twice because it contains much calcium and can be used along with lettuce and other vegetables in various preparations. Their taste is very close to that of the root, with some peppery notes here and there.
One cup of turnip greens will give you around 80 mg of calcium, which is also close to 10% of your recommended daily intake. It also contains vitamin A and folate. These nutrients in turnip greens work synergistically to slow neurodegenerative problems as we age.