The dietary absorption of vitamin B-12 is complex. It's not just a matter of swallowing a bunch of it (dietary or supplemental) and letting the guts do the work. There is something called "intrinsic factor" which is made in certain cells in the stomach that must be present in order for B-12 to be absorbed at a point in the very end of the small intestine (the ileum).
The main sources of B-12 include meat, eggs, and dairy products. Acids in the stomach separate the B-12 from the protein source, at which point it must combine with intrinsic factor. The vitamin B-12/intrinsic factor complex travels through the intestine and is absorbed in the terminal ileum by cells with specific receptors for the complex. The absorbed complex is then transported via plasma and stored in the liver. The interruption of one or any combination of these steps places a person at risk of developing deficiency. Not all substances are easily absorbed sublingually, if at all. A substance’s ability to be absorbed is affected by lipid solubility, the permeability of the solution, ionization (pH), and the molecular weight of the substance. Dr. Libby’s extensive background in biochemistry and nutrition, along with his years of study with Nobel Prize chemist, Linus Pauling, make his patented Sublingual B-12 formula second to none. Sublingual B-12, B-6, & Folic Acid is readily absorbed, delivering almost all of its power directly into the bloodstream.
Kim Buchanan
TriVita Business Affiliate 11225081
http://trivitaproduct.info/
http://www.trivitaproduct.info/b12
http://vitamin-b12-supplements.blogspot.com/
Resource: TriVita Web Site
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