1

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Oyster Shell Calcium. Is it good?

Answered on August 19, 2014
Created August 31, 2012 at 5:32 PM

Between calcium citrate, calcium carbonate, and calcium from oyster shells, which is best?

And also, are any very bad? I bought oyster shell calcium pills from CVS because they seem cheapest. Haven't tried them yet. Thoughts on their bioavailability/health?

Thank you!!

C0c839648b31512515daaffe8e4e9ad1

(468)

on August 31, 2012
at 07:40 PM

Well, then I'll take these until they run out and then get the citrate. They are big pills. Maybe I will cut them in half too. Thank you!

3eca93d2e56dfcd768197dc5a50944f2

(11697)

on August 31, 2012
at 06:50 PM

Mg Citrate is not absorbed as well as Mg Malate. Citrate is used mostly in high doses to clean up bowels before surgery, exactly because it's the form that it's not getting absorbed much.

782d92f4127823bdfb2ddfcbcf961d0e

(5231)

on August 31, 2012
at 06:40 PM

I'm a pharmacist also.

C0c839648b31512515daaffe8e4e9ad1

(468)

on August 31, 2012
at 06:30 PM

It doesn't say calcium carbonate on the bottle anywhere. I checked. It doesn't say citrate either. And I checked with a pharmacist when I bought it, and she recommended the oyster shell one as an alternative to citrate. This was only because I wanted a cheaper alternative than the citrate bottle. And it is cheaper!

782d92f4127823bdfb2ddfcbcf961d0e

(5231)

on August 31, 2012
at 06:22 PM

The bones in sardines are very soft. I usually eat them about twice a week. You don't even know the bones are there. And it's magnesium that I hope you are supplementing with.

Ebb10603524dd22621c1155dd7ddf106

(19150)

on August 31, 2012
at 06:01 PM

Your calcium intake is most certainly not zero. You're right, calcium from veggies isn't as available to the body as calcium from animal sourced foods. However, virtually all animals sourced foods have calcium. I still suggest not worrying to much. Heck, don't even take my word for it - just read up more in many of the available Paleo books. As for small fish - smelts are sardines, if cooked well, the bones are easily chewed. Don't try to eat bones from big fish, or you may be in for a surprise. :-)

C0c839648b31512515daaffe8e4e9ad1

(468)

on August 31, 2012
at 05:51 PM

Unfortunately I have not yet learned how to eat bone broth, and little fish bones make me nervous. I am working up to it. But in addition, I am would not be getting enough calcium from just.. the occasional kale. I do supplement Vit D and magnesium (or is it manganese). I think I absolutely have to use them at this point. Many days my calcium intake is 0. But thank you.

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3 Answers

1
782d92f4127823bdfb2ddfcbcf961d0e

on August 31, 2012
at 06:39 PM

Calcium from oyster shells is calcium carbonate. I take calcium citrate because I think it is more bioavailable and it's easier on the stomach. I'm not sold on coral calcium--I thought it was environmentally damaging but I could be wrong. It was a big fad a few years ago.

I take calcium (and megadoses of Vit D3 and also magnesium) because my bone density scan last year, before paleo, showed that I may have osteoporosis. It's frustrating because I lifted weights three times a week and even then I still ate pretty well. After cutting out grains I had joint pain resolve. I do have an appt with a rheumatologist coming up so we'll see how I'm doing and if I can stop the calcium. BTW I got my Vit D3 levels up to 86ng/ml so I hope my bones are ok cause I aint gonna be taking any bisphosphonates!

782d92f4127823bdfb2ddfcbcf961d0e

(5231)

on August 31, 2012
at 06:40 PM

I'm a pharmacist also.

C0c839648b31512515daaffe8e4e9ad1

(468)

on August 31, 2012
at 07:40 PM

Well, then I'll take these until they run out and then get the citrate. They are big pills. Maybe I will cut them in half too. Thank you!

1
Ebb10603524dd22621c1155dd7ddf106

(19150)

on August 31, 2012
at 05:47 PM

Why are you supplementing with calcium? Even the mainstream media is aware of the dangers of calcium supplementation these days.

The best thing you can do for your bones is resistance training, and possibly supplementing Vitamin D (often lacking). If you are following a paleo-inspired diet, you are probably getting more than enough calcium.

If you find that you need more, plenty of small fish (bones and all), and bone broths are much better ways to get supplemental calcium.

If you absolutely have to use calcium pills, stick with the bioavailable-sourced options - coral, oyster shell, etc.

Ebb10603524dd22621c1155dd7ddf106

(19150)

on August 31, 2012
at 06:01 PM

Your calcium intake is most certainly not zero. You're right, calcium from veggies isn't as available to the body as calcium from animal sourced foods. However, virtually all animals sourced foods have calcium. I still suggest not worrying to much. Heck, don't even take my word for it - just read up more in many of the available Paleo books. As for small fish - smelts are sardines, if cooked well, the bones are easily chewed. Don't try to eat bones from big fish, or you may be in for a surprise. :-)

782d92f4127823bdfb2ddfcbcf961d0e

(5231)

on August 31, 2012
at 06:22 PM

The bones in sardines are very soft. I usually eat them about twice a week. You don't even know the bones are there. And it's magnesium that I hope you are supplementing with.

C0c839648b31512515daaffe8e4e9ad1

(468)

on August 31, 2012
at 05:51 PM

Unfortunately I have not yet learned how to eat bone broth, and little fish bones make me nervous. I am working up to it. But in addition, I am would not be getting enough calcium from just.. the occasional kale. I do supplement Vit D and magnesium (or is it manganese). I think I absolutely have to use them at this point. Many days my calcium intake is 0. But thank you.

0
E71b7d523cf9fbf7d26f1b5dd7341cb7

on August 31, 2012
at 06:26 PM

They don't call calcium carbonate tablets "bedpan bullets" for nothing. They are not well absorbed. I recommend citrate along with Vit D to my patients (I'm a pharmacist).

C0c839648b31512515daaffe8e4e9ad1

(468)

on August 31, 2012
at 06:30 PM

It doesn't say calcium carbonate on the bottle anywhere. I checked. It doesn't say citrate either. And I checked with a pharmacist when I bought it, and she recommended the oyster shell one as an alternative to citrate. This was only because I wanted a cheaper alternative than the citrate bottle. And it is cheaper!

3eca93d2e56dfcd768197dc5a50944f2

(11697)

on August 31, 2012
at 06:50 PM

Mg Citrate is not absorbed as well as Mg Malate. Citrate is used mostly in high doses to clean up bowels before surgery, exactly because it's the form that it's not getting absorbed much.

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