To Gallop or anyone who can share correct information about the synthesis of minerals in horses.?

Hi. I haven't encountered the same conclusions on calcium carbonate bioavailability in any credible resources I've encountered, so I can't comment on it. I have read numerous studies on it and overall bioavailability of calcium carbonate hasn't been shown to be significantly different from that of other dietary calcium sources. Amorphous calcium carbonate has been shown to be more bioavailable than the crystalline form, and calcium citrate has been shown to be better used in some studies and not in others, but nonetheless they are all absorbed and utilized in the studies I've seen.

I'm posting a very good abstract which presents a thorough overall presentation of what the numerous studies on this have entailed and on what they've shown. It is lengthy, but worth the read, and provides credible data that disputes some of the commonly perpetrated misinformation out there. It also cites resources for additional information. You can also type "calcium carbonate bioavailability pubmed" into your search engine and various studies available online will come up, with some more credible than others.

Anyway, here is the abstract..............

http://www.jacn.org/content/19/suppl_2/119S.full

This article specifically cites equine research that has shown calcium carbonate to be readily absorbed from the intestine and independent of vitamin D...................

http://www.ivis.org/proceedings/eenhc/2006/kienzle...

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Add.............. Studies in the past that have proposed poor absorption of calcium from calcium carbonate actually either measured solubility of the calcium compound outside of the body, or they measured urinary excretion of calcium and then interpreted the results to be indicators of how much had been absorbed into the blood stream. However, in vitro solubility and urinary excretion have been shown to be unreliable predictors of how much calcium is actually being absorbed.

I'll be interested in seeing the answer to this. A brief look on-line revealed little. There are some scientific papers, mostly behind pay-walls, and I'm not about to spend several hundred dollars to read all of them. Based on what I know of acids vs CaCO3, I would guess that Ca from CaCO3 is actually bioavailable. All that is needed is sufficient acid to separate Ca++ from CO3-- (presumably CO3-- ==> CO2 + O--) in solution.

I'd be interested in pointers to papers showing that CaCO3 is not a good source.

The other part of the body's use of Ca in bone formation is vitamin D. It is clear from the occurrence of rickets that D plays a major role in Ca use. From what I have been able to tell, sunshine on the skin of the human body in the summertime produces a sufficient level of vitamin D in less than an hour. In the winter, or for people who live only indoors, the situation is different. During the winter I take 5000 IU/day of D3 even though I spend a lot of time outdoors. I seem to have no bone problems, in spite of my advanced age, and when I cracked a rib recently in an accident it healed right up in less than six weeks.

Horses, along with all other mammals, make Vitamin D from sunlight on the skin. I do not know how well this works, but it's rather obvious that the heavier hair and fainter sunlight of winter could pose difficulties. Some supplements for horses contain Vitamin D.

Your info is out of date. According to what I have found there is little difference in calcium absorption. All calcium salts have an absorption rate of approximately 20 to 40% EVEN calcium carbonate.

It seems there is a confusion between absorption and soluability. Regardless in the stomach calcium carbonate is converted to calcium chloride by the hydrochloric acid of the stomach.

This is the most reliable source I found...simply because, they are not selling anything.

http://www.evitamins.com/encyclopedia/assets/gener...

i've got been driving for 15 years (in view that previously i'd desire to stroll) and that i purely have 3 issues that have handed off to me and that they at the instant are not even substantial. as quickly as i became feeding the horses in the pasture and the dogs comes out to chase the horses the horse freaks out and kicks me in the tummy and that i had a hoof print on my abdomen until day after immediately. yet over returned my pony became aggravated via the flies and shook her total physique, down I went like a rock no longer a scratch I have been given back on and finished day of opposition. Then maximum present day my mothers horse have been given slightly excited and gave slightly dollar I 0.5 fell 0.5 jumped the worst element that handed off became a bruise on my butt.