My Healthy Today - Menopause Increasing daily calcium will not reduce the risk of fractures in later life

The authors conclude that while low levels of calcium intake (less than 700 mg per day) increase the risk of fractures and osteoporosis, there is no need to start increasing calcium intake above the amount. Increases did not further reduce the fracture and osteoporosis risk.

free full access: Calcium supplements with/without vitamin D and risk of cardiovascular events: reanalysis of the Women’s Health Initiative - bmj.com (including responses)

Abstract/Conclusions:
Calcium supplements with or without vitamin D modestly increase the risk of cardiovascular events, especially myocardial infarction, a finding obscured in the WHI CaD Study by the widespread use of personal calcium supplements. A reassessment of the role of calcium supplements in osteoporosis management is warranted.

excerpt (from full text):

"...An important question that arises is whether co-administered calcium and vitamin D affects cardiovascular risk. The Women’s Health Initiative reported no adverse effect of calcium and vitamin D (1 g calcium/400 IU vitamin D daily) on any cardiovascular end point in their large (n=36 282), seven year, randomised, placebo controlled trial.3 4 However, 54% of the participants were taking personal (non-protocol) calcium supplements at randomisation and 47% were taking personal vitamin D supplements, effectively rendering this trial a comparison of higher dose and lower dose calcium and vitamin D for most of the participants.

Allowing clinical trial participants free access to the intervention being studied is unusual and has the potential to obscure both adverse and beneficial effects..."

HealthNewsReview.org - new Osteoporosis Drug

Long-Term Use of Bisphosphosphonates in Osteoporosis Jnl Clin Endocrinol Metabolism