Calcium supplements and coronary artery calcium score

Observational Data Most observational data suggests that increase in DIETARY Calcium is not associated with higher CAC, and some cohorts even show lower odds/risk of calcification with higher dietary intake. Regarding CALCIUM SUPPLEMENTS: Some cohort data (including analyses from the MESA cohort) suggest supplement users may have higher odds of incident CAC compared with getting calcium mainly from food. However, other analyses in MESA did not find a substantial association between calcium supplements and actual heart attacks/CVD events, which is the REAL outcome that matters Randomized Trial Data (Higher Quality) In a Women’s Health Initiative substudy looking at coronary calcium, calcium + vitamin D supplementation showed no difference in CAC scores after years of follow-up. Recent trial meta-analyses overall find no clear significant increase in CHD or stroke risk (and if there is any risk, it appears small). BOTTOM LINE 1. Food-first calcium is the safest default (Milk, Dahi etc) 2. Don’t take calcium supplements “just because” for heart health or CAC prevention—there’s no proven CAC benefit. 3. If a supplement is truly needed (osteoporosis, low intake, certain high-risk groups), aim for modest doses unless advised otherwise by physician 4. Be extra cautious and individualize if there’s kidney disease, recurrent kidney stones, hypercalcemia, hyperparathyroidism, or heavy use of calcium-based antacids. Always discuss with your doctor before following advice.