Vitamin C
Eating strawberries, oranges, lemons, grapefruit, guava, pineapple, raspberries, mangoes, lychees, persimmons, bell peppers, hot chili peppers, kohlrabi, broccoli, brussels sprouts, cauliflower, cabbage, rutabagas, tomatoes, summer squash, and other fruits and veggies that are rich in vitamin C enables your body to produce collagen, a protein that contributes to bone strength and integrity. Studies suggest that these vitamin C–rich foods may also slow the rate of bone loss as we age.