Dark green leafy vegetables Include lots of dark green leafy vegetables like spinach, broccoli and lettuces in your diet. All these dark green leafy vegetables are an excellent source of vitamin A and Vitamin C. Both these vitamins help in the formation of sebum, which is a natural hair conditioner and hence moisturizes your skin and scalp.Leaf vegetables, also called leafy greens, salad greens, pot herbs, vegetable greens, or simply greens, are plant leaves eaten as a vegetable, sometimes accompanied by tender petioles and shoots.