Is it safe to take 1000mg of calcium a day? What you need to know
                                
                                
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                                    4 min read                                
                            
                                For adults between the ages of 19 and 50, the Recommended Dietary Allowance (RDA) for calcium is 1000mg per day. Given this guideline, many people ask: is it safe to take 1000mg of calcium a day, or does the amount and source matter for your health?