If more calcium/vitamin d or big pharma meds were the solution for bone density issues, then there would be no rich women (who actual take medical advice from a physician) with osteoporosis. There is plenty of calcium in the diets of American women. The issue is hypoaminoacidemia and the fact that most American start losing 1% of their skin and muscles each year from the age of 20. Protein degradation is the under appreciated contributor of bone loss. You need collagen
for infrastructure to the calcium.