Calcium absorption is a less than straightforward matter.
David Roll, director of dietary supplements for the Rockville-based U.S. Pharmacopeia (U.S.P.), which sets voluntary quality standards for dietary supplements, explains that a tablet of 1,500 milligrams of calcium carbonate contains about 600 milligrams of calcium (40 percent of the total) that is available to be absorbed by the body -- of which perhaps 200 milligrams would actually be absorbed.
The recommended daily intake of 1,000 milligrams of calcium [in humans], he says, is the amount experts say you should ingest, not how much would actually be absorbed.
…pure calcium carbonate is 30 to 35 percent absorbable -- no matter how it is sold…
Stay clear of “Sea Coral” as a Calcium source…imho.
Most Experts Do Not Believe The Extraordinary Claims that have been made for Calcium Supplements Derived From Sea Coral…
…Paul Takahashi, a geriatrician at the Mayo Clinic, cautions such patients against taking Coral calcium. He also worries that the product -- like all dietary supplements, it is only lightly regulated by the Food and Drug Administration (FDA) –
may contain harmful amounts of heavy metals such as lead, mercury and cadmium…
Bob Barefoot (owner of largest online retailer) claims the calcium in his product is more easily absorbed by the body, thanks to "70 trace nutrients and the perfect amount ofmagnesium.. Coral calcium, he says, is "70-plus [percent] absorbable by the body," compared with what he claims is 1 percent for the calcium-containing antacid Tums.
Disbelief is the reaction of Adrianne Bendich, clinical director of calcium research at GlaxoSmithKline, the maker of Tums… …Robert Heaney, a professor of medicine at the Creighton University School of Medicine in Omaha, isn't buying that without proof.
Heaney, who helped revise government recommendations on calcium intake in 1997, said he has asked Barefoot for data, without success…
Heaney also dismisses as "utter nonsense" Barefoot's assertion that Tums is 1 percent absorbable. . Heaney, who has tested the absorption of calcium products in the body, says pure calcium carbonate is 30 to 35 percent absorbable -- no matter how it is sold.
…According to SPINS, a San Francisco-based market research firm, calcium derived from coral has grown into at least a $6.5 million business over the past year. "Tens of millions of people are using it," claims Bob Barefoot, 59, of Wickenberg, Ariz., the most prominent U.S. marketer of coral calcium, which he sells under such names as Coral Calcium Supreme and Best Coral Calcium Supreme Plus. "Can they all be wrong?"
Quite possibly, according to a wide array of academic experts, mainstream and alternative medicine clinicians and even dietary supplement industry reps. They say there is no evidence to support many claims made about coral calcium… "It's the hottest quack product in the last 50 years," says retired Allentown, Pa., psychiatrist Stephen Barrett, who posts blistering critiques of alternative medicine on his www.Quackwatch.com
Web site. "I've never seen such intense promotion in my life."
Also when deciding to supplement a cornsnakes diet, it is helpful to remember that Reptiles, in general, use vitamin D3 as a catalyst that bonds to calcium and allows it to be assimilated.
So, In other words, no matter how much calcium you add to your animals diet it cannot be processed and used without the proper amount of D3 being present for assimilation.
That’s why one see’s products such as “Repcal with D3” http://www.repcal.com/supp.htm#Ultrafine%20Calcium
MINER-ALL I with vitamin D-3 http://www.miner-all.net/STFMINER-ALL.htm
that are gaining in popularity with reptile keepers.