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Vitamin C: Doses
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Taking a daily dose of Vitamin C can strengthen your immune system and that, in turn, can help you avoid colds and nasty viruses, new research from Texas says. Scientists discovered in a test of 12 patients that disease-killing white blood cells were much more active after patients had taken daily doses of the vitamin for two weeks.
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Since the body processes Vitamin C quickly, many experts recommend taking Vitamin C in doses of 500 mg twice per day. For intense training, some experts recommend all athletes training hard intake about 3 grams per day.
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Transport of vitamin C is a saturable and dose dependent process that occurs by active transport. At the intestine and cells AA is oxidized to DHAA, which is more quickly transported across the cell membrane. Once inside the tissue or intestinal epithelium the vitamin is reduced back to AA. | The degree of intestinal absorption decreases as intake of AA increases. Intakes of 1 to 1.5 grams results in 50% absorption, but at intakes over 12 grams only 16% of the vitamin is absorbed. In contrast, an intake of less than 20 mg, has a 98% absorption rate (13).
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Vitamin C is beneficial in the health and maintenance of collagen tissue of the vascular system. It ... helps to decrease the formation of clots, decreasing your risk of stroke as well as heart attack. Additionally it binds with iron to reduce the amount of iron in your system. Three thousand milligrams is a minimum daily requirement for most individuals in today’s world (Dr Gordon uses 9,000mgs). Do not believe the fear mongers spreading rumors of diarrhea and kidney stones. At one time large doses of vitamin C were used as a cure for constipation (what a healthy remedy).
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Vitamin C is considered nontoxic. Diabetes medications such as chlorpropamide (Diabinese) and sulfa drugs may not be as effective if taken with Vitamin C. Taking high doses of Vitamin C may cause a false-negative reading in tests for blood in the stool. Anyone who has a history of kidney stones should take Vitamin C only with physician approval. Unusually excessive doses may cause intestinal upset, gas or diarrhea. Diarrhea, gas, or other intestinal disturbances are harmless and reversible with lower dosing. Pregnant or nursing mothers should not use amounts larger than 5,000 mg. daily.
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Vitamin C is safe in relatively large doses but excessive intakes may cause diarrhea, nausea, stomach cramping, excess urination and skin rashes. There is the possibility of kidney stones in those with kidney disease. These effects may occur when doses above 1 g are taken regularly. Chewable vitamin C may lead to tooth decay.
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