Lesser known than calcium and vitamin D but still critical to bone health are magnesium and potassium. And what’s more, these nutrients all work together to protect your bones. Being deficient in magnesium can throw off your balance of vitamin D. Potassium, on the other hand, is able to neutralize the acids in your body that otherwise leach calcium right out of your bones.
Both sweet and white potatoes are a rich source of magnesium and potassium. Just be sure to bake or boil them, rather than fry them in oil, to preserve the health value.