While sufficient calcium can be had from diet alone, many women don't get the proper amount. Most women average just 600 mg a day through their diet. 1500 mg after menopause. The upper limit is 2,500 mg per day. Too much calcium can cause constipation.
Vitamin D is necessary in order for the body to absorb the calcium.
Folate has been recently added to grain foods in the U.S. to prevent heart disease, as well as lessen the risk of spina bifida in newborns. The RDA has been increased to 400 mcg per day. Folate is abundant in citrus fruits and green, leafy vegetables. Taking a little extra B6 with the folic acid is a good idea, as studies show this combination is related to a decrease in heart disease.