Good that you take your magnesium with your calcium, it can be dangerous to take just calcium alone. I don't know that weight loss effects bone mass loss but if you are dieting you could be losing important nutrients needed to bind the calcium you take to your bones and to keep them strong, sich as Boron or Vitamin D.
See the article below and it can explain more about osteoporoosis and calcium and other minerals used to maintain the bones.
NOTICE: The information provided on this site is not a substitute for professional medical advice,
diagnosis, or treatment. Never delay or disregard seeking professional medical advice from your
physician or other qualified health provider because of something you have read on Wellsphere.
If you have a medical emergency, call your doctor or 911 immediately.