Vitamin C helps the body build up resistance. It is also an antioxidant that neutralize free radicals as well as helping the body to form collagen, which supports tissues within the body. Calcium is necessary to build strong bones and teeth. At different stages of their lives, women tend to lose calcium, which is the reason why many women are more prone to osteoporosis and broken bones in their old age. It is especially important during pregnancy, lactation, periods of rapid growth and old age. For most women, this means adequate amounts of calcium are important for most of their lives.