Mainstream biology continues to insist that calcium is essential to bone strength and structure, but its time we dig into this assumption and reframe the question.

What if bones aren't structured because of calcium, but are instead primarily a place where the body stores excess calcium to keep it out of circulation and protect more vulnerable cells from calcification?

Rather than calcium building or strengthening bone, what if calcium is stored in bone to keep it away from soft tissues and circulation, much like the liver isolates toxins, or fat stores hold on to environmental pollutants.

Traditionally, we’re told that calcium is vital for bone because it combines with phosphate to form hydroxyapatite crystals - the stuff that supposedly gives bones their hardness. Bone cells, osteoblasts and osteoclasts, constantly rebuild and break down bone tissue in a process we’re taught depends heavily on calcium.

We've been told that this is why calcium supplementation is so important. Without proper calcium supplementation, our bones can't rebuild themselves and so we become prone to osteoporosis and bone fracture.

This calcium supplementation narrative has continued to exist for the past 40 years, despite INSANE amounts of evidence to the contrary.


Here are 10 studies which found that calcium supplementation actually did NOTHING to improve bone health or reduce bone fractures, but did in fact increase risk of death from heart disease, GI distress, kidney stones and liver harm:

  1. "Our findings suggest that high intake of supplemental calcium is associated with an excess risk of CVD death."
Dietary and supplemental calcium intake and cardiovascular disease mortality: the National Institutes of Health-AARP diet and health study - PubMed
Our findings suggest that high intake of supplemental calcium is associated with an excess risk of CVD death in men but not in women. Additional studies are needed to investigate the effect of supplemental calcium use beyond bone health.
  1. "Calcium supplement use may increase the risk for incident coronary artery calcification."
Calcium Intake From Diet and Supplements and the Risk of Coronary Artery Calcification and its Progression Among Older Adults: 10-Year Follow-up of the Multi-Ethnic Study of Atherosclerosis (MESA) - PubMed
High total calcium intake was associated with a decreased risk of incident atherosclerosis over long-term follow-up, particularly if achieved without supplement use. However, calcium supplement use may increase the risk for incident CAC.
  1. "Calcium supplementation in healthy postmenopausal women is associated with upward trends in cardiovascular event rates. This potentially detrimental effect should be balanced against the likely benefits of calcium on bone."
Vascular events in healthy older women receiving calcium supplementation: randomised controlled trial - PubMed
Australian Clinical Trials Registry ACTRN 012605000242628.
  1. "Calcium supplements cause gastrointestinal side effects, particularly constipation, and increase the risk of kidney stones and, probably, heart attacks by about 20%."
Calcium and/or Vitamin D Supplementation for the Prevention of Fragility Fractures: Who Needs It? - PMC
Vitamin D and calcium have different biological functions, so the need for supplementation, and its safety and efficacy, need to be evaluated for each separately. Vitamin D deficiency is usually the result of low sunlight exposure (e.g., in frail…
  1. "Taking calcium supplements produces small non progressive increases in BMD, which are unlikely to lead to a clinically significant reduction in risk of fracture."
Calcium intake and bone mineral density: systematic review and meta-analysis - PubMed
Increasing calcium intake from dietary sources or by taking calcium supplements produces small non-progressive increases in BMD, which are unlikely to lead to a clinically significant reduction in risk of fracture.
  1. "These data support the hypothesis that calcium tablets increase the incidence of adverse GI events."
Adverse events from calcium supplementation: relationship to errors in myocardial infarction self-reporting in randomized controlled trials of calcium supplementation - PubMed
The clinical effects of calcium supplements on adverse events reporting have not been well described. This study reviews randomized controlled trial (RCT) evidence of adverse events to clarify the epidemiology of these events. The hypothesis that patient self-report of myocardial infarction (MI) is …
  1. "Combining this recent finding with available data associating calcium supplementation with cardiovascular mortality and all-cause mortality, we call on the need for an evidence-based approach to calcium supplementation, while stressing on the safety of dietary calcium intake over the former on cardiovascular health."
Calcium supplementation and cardiovascular risk: A rising concern - PMC
Over the past decade, the number of individuals taking calcium supplementation worldwide has been on the rise, especially with the emergence of new pharmaceutical companies specialized in the marketing of dietary supplements; with calcium…
  1. "Calcium supplementation was present in the groups with hypertensive pregnant women."
Calcium intake in high-risk pregnant women assisted in a high-complexity hospital - PubMed
Pregnancy is characterized by physiological changes. One of these changes involves calcium. During this period, an increased in calcium excretion occurs as well as an increased intestinal absorption and renal reabsorption, so that the adequate growth and development of the fetus can happen. Low calc …
  1. "Ca supplements do not provide a benefit to overall Ca metabolism or bone characteristics and that the amount of Ca consumed is of greater influence in enhancing Ca nutrition and skeletal strength."
Diet calcium level but not calcium supplement particle size affects bone density and mechanical properties in ovariectomized rats - PubMed
Calcium (Ca) supplements, especially Ca carbonate (CaCO3), are the main alternative sources of dietary Ca and an important part of a treatment regimen for osteoporosis, the most common metabolic bone disorder of aging and menopause. In a female ovariectomized (OVX) rat model for studying postmenopau …
  1. "A recent meta-analysis of randomized clinical trials showed that calcium supplementation was not associated with a low risk of fractures among community-dwelling older adults. There has been a concern for a significant increase in the risk of cardiovascular diseases with high supplemental calcium intake." [PubMed: The good, the bad, and the ugly of calcium supplementation: a review of calcium intake on human health]

"Ask anyone how to prevent bone fractures and they're likely to answer, "Get more calcium." Medical experts have tended to agree. For example, the Institute of Medicine advises a calcium intake of 1,000 to 1,200 milligrams (mg) a day for most adults. But in the last five years, we've also learned that calcium — at least, in the form of supplements — isn't risk-free. An intake of 1,000 mg from supplements has been associated with an increased risk of heart attack, stroke, kidney stones, and gastrointestinal symptoms.
Now an analysis of reams of research concludes that consuming calcium at that level doesn't even reduce fractures in people over 50. And a related analysis indicates that increasing calcium intake has only a modest effect on bone density in people that age. Both were published online this week in the medical journal BMJ."

-Harvard Health

Dairy, Supplements Do Little For Bones, Study Finds
A new study should put the final nail in the coffin for any lingering beliefs that calcium supplements are good for you.

The bones are like a kind of vault, storing whatever calcium isn’t being actively used elsewhere. And when levels drop, the body draws on those reserves.

That would explain why people with low calcium intake often develop osteoporosis, it’s not that calcium is missing from the diet so the bones can’t be built, it’s that the body is pulling calcium from the bones to keep the rest of the system functioning.