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A 46-year-old member asked:

What's the difference between calcium citrate and calcium carbonate?

1 doctor answer2 doctors weighed in
Dr. Frederick Singer
Endocrinology 58 years experience
Absorption: Calcium citrate and calcium carbonate are calcium supplements which are recommended to people who do not use dairy products. Calcium carbonate is not well absorbed in people who have low amounts of acid in the stomach. Calcium citrate is well absorbed in the absence of acid.

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Similar questions

A 34-year-old member asked:

What calcium supplement should I use, calcium carbonate or calcium citrate?

1 doctor answer1 doctor weighed in
Dr. David Sneid
Endocrinology 41 years experience
Either: Just make sure you take the proper amount to balance with your diet and take 2000 units vitamin d3 as well, citrate is easier to absorb and doesn't need to be taken with meals, but can be more expensive and less "calcium dense" per pill.
A 47-year-old member asked:

What are the pros and cons of calcium citrate vs. Calcium carbonate for osteoporosis?

2 doctor answers3 doctors weighed in
Dr. Frederick Singer
Endocrinology 58 years experience
Calcium absorption: Calcium citrate is readily absorbed by the intestine in the absence of acid in the stomach whereas calcium carbonate is poorly absorbed in the absence of acid. However calcium carbonate is absorbed if taken with a meal.
A 31-year-old member asked:

Is calcium carbonate a better calcium supplement than calcium citrate?

2 doctor answers5 doctors weighed in
Dr. Cayce Jehaimi
Pediatric Endocrinology 21 years experience
No: No, the only difference is that the former is better taken with food whereas the latter (calcium citrate) can be taken on an empty stomach.
A 33-year-old member asked:

What is better for bones? Calcium carbonate or calcium citrate?

1 doctor answer1 doctor weighed in
Dr. Linda DiMeglio
Pediatric Endocrinology 28 years experience
Either ok: Either form of calcium is reasonable to take as a supplement. Choose a form that you won't mind taking as some are definitely more palatable than others. Calcium citrate may be somewhat better absorbed as calcium is best absorbed with some acid. In general, what is more important is to space out your calcium consumption throughout the day as possible since if you take all your calcium at one time it is not well absorbed.

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Last updated Feb 27, 2020

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