Wiktionary(0.00 / 0 votes)Rate this definition: 1  axiom(Noun) A seemingly self-evident or necessary truth which is based on assumption; a principle or proposition which cannot actually be proven or disu2010proven. 2  axiom(Noun) A fundamental theorem that serves as a basis for deduction of other theorems.
Vitamin D and Constipation-. A Preventable Problem. Constipation is one of these signs of magnesium deficiency and if you are getting constipation from vitamin d, then your body is telling you that you ARE magnesium deficient and that you probably have been for a long long time.
Vitamin D. Increase your body's absorption of calcium without having to take excessive doses by getting plenty of vitamin D. The active form of vitamin D increases absorption of both calcium and magnesium and inhibits excretion of calcium through the urine. Without vitamin D, calcium is very poorly absorbed.imilarly, high doses of vitamin A can inhibit vitamin K absorption. Conversely, some vitamins are absorbed more efficiently in the presence of other vitamins. Vitamin C increases the absorption of chromium and iron. Some vitamins participate in the transport of other vitamins into the body.