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Influence of calcium supplements on the occurrence of cardiovascular events
Leanne Downing1, Mohammed A Islam
1School of Pharmacy, Lake Erie College of Osteopathic Medicine (LECOM), Bradenton campus, Bradenton, FL, USA.
Insights
Calcium supplementation shows varied cardiovascular effects. While some studies link it to increased risks, overall benefits for bone health appear to outweigh potential cardiovascular concerns.
Area of Science:
- Cardiovascular Health
- Nutritional Science
- Epidemiology
Background:
- Calcium is essential for bone health.
- The impact of calcium supplementation on cardiovascular health remains debated.
- Existing research presents conflicting findings regarding calcium's cardiovascular risks and benefits.
Purpose of the Study:
- To review the current scientific literature on the effects of calcium supplementation on cardiovascular health.
- To synthesize evidence from observational studies and clinical trials concerning calcium intake and cardiovascular outcomes.
- To evaluate the potential risks and benefits of calcium supplements for cardiovascular well-being.
Main Methods:
- Comprehensive literature search for observational studies and clinical trials.
- Analysis of studies examining calcium supplement use and risks of cardiovascular disease (CVD), myocardial infarction (MI), and stroke.
- Inclusion of studies focusing on bone health to assess broader calcium effects.
Main Results:
- 13 observational studies and 9 clinical trials were identified.
- Many studies found no significant association between moderate calcium supplementation and adverse cardiovascular outcomes.
- Some evidence suggests a potential increased risk of MI with higher calcium intake, and a possible link to carotid artery plaque.
- Limitations in studies include small sample sizes, lack of control for risk factors, and reliance on self-reported data.
Conclusions:
- Findings on calcium supplementation and cardiovascular health are varied and should be interpreted with caution due to study limitations.
- The overall benefits of calcium supplementation, particularly for bone health, seem to exceed the theoretical cardiovascular risks.
- Further research with robust methodologies is needed to clarify the relationship between calcium intake and cardiovascular events.
Purpose:
The current literature on the effects of calcium supplementation on cardiovascular health is reviewed.
Summary:
A comprehensive literature search identified reports on 13 observational studies and 9 clinical trials pertaining to calcium supplement use and the risk of adverse outcomes such as cardiovascular disease (CVD), myocardial infarction (MI), and stroke; cardiovascular events were not primary endpoints of any of the reviewed studies, most of which focused on the effects of calcium use on bone health. Several large cohort studies by researchers in Australia, France, Germany, Sweden, the United Kingdom, and elsewhere have found no significant associations between moderate calcium supplementation and adverse cardiovascular outcomes in otherwise healthy individuals; in some studies, calcium use appeared to confer preventive benefits. However, evidence from other studies suggests that increased calcium supplementation may be associated with an increased risk of MI, as well as a possible link between elevated serum calcium levels and carotid artery plaque buildup. In general, the studies of calcium use and cardiovascular health published to date have had important limitations (e.g., small samples, homogeneous study populations, reliance on self-reported data, lack of or inadequate controlling for established CVD risk factors), and the findings should be interpreted with caution.
Conclusion:
The results of studies on the influence of calcium supplements on the cardiovascular system have been varied. Overall, the benefits of calcium supplementation, including the positive effects on bone health, appear to outweigh the theoretical risk of increased cardiovascular events.
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