Hmm. Mikey - what do you think of this study? http://www.nytimes.c...tudy-finds.html
I do notice that whenever I take around 2000 mg of vitamin C via supplements, I feel pretty awful. Do you have any studies that counter the one above?
I remember reading that nonsense back when it was published.
My opinion is it was just more snot made up by the anti-vitamin vampires, generally whore scientists in cahoots with
the medical/pharmaceutical industry - to cook up bogus studies to scare people from taking nutrients that might make them healthier, so they need less drugs over the long term.
That study is simply the product of competition with the vitamin industry.
More credible is the research of Dr. Carol S. Johnston, head of USDA nutrition for 30+ years, who was assigned to find a tolerable upper limit for vitamin C and could not find it.
I wrote the following for a white paper on nutrient dosing:
There is no solid scientific reason for an LOAEL (Lowest Observed Adverse Effect Level) or NOAEL (No Observed Adverse Effect Level) for Vitamin C. The National Academy of Sciences established a NOAEL for Vitamin C in June, 2000 because they were directed to establish one. They could not find support for any toxic dose for Vitamin C, so they arbitrarily placed an NOAEL with no solid data to validate it.
The above statement regarding “no solid data to validate it” is supported by a study sponsored by the U.S. Government Institute of Medicine-sponsored Food and Nutrition Board.
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Johnston CS. Biomarkers for establishing a tolerable upper intake level for vitamin C. Nutr Rev 1999 Mar;57(3):71-77.
Dietary reference intakes (DRIs) for vitamin C for healthy U.S. populations are currently being formulated by the Panel on Dietary Antioxidants and Related Compounds of the Food and Nutrition Board of the Institute of Medicine. A major task of the Panel is to analyze the evidence of adverse effects of high-dose vitamin C intakes to derive, if appropriate, a Tolerable Upper Intake Level (UL) for vitamin C. The present report details current and past research examining potential adverse effects of supplemental vitamin C. The available data indicate that very high intakes of vitamin C (2-4 g/day) are well tolerated biologically in healthy mammalian systems.
Currently, strong scientific evidence to define and defend a UL for vitamin C is not available.--------------------------------------------------------------
Dr. Johnston said that there is no "strong scientific evidence” to defend a position for a "tolerable upper limit" (UL) for Vitamin C --- because Vitamin C has not been shown to cause toxicity to cells in the body, even at very high doses. (Note: UL equals the Tolerable Upper Limit, which is generally in the same dosage range as the NOAEL.) She also noted that 2000 to 4000 mg was a daily dose that may be optimal for humans, based on her extensive review of the scientific literature.
I see no credible data being published since she determined this in her comprehensive review of the published literature to change anyone's perspective on vitamin C's lack of cytotoxicity.
Vitamin C is actually safer than milk, as mother's milk was shown to have killed 155 babies because of drugs that passed through breast milk in the 2010 report of the US Poison Control Centers.
Vitamin C doesn't kill cells, even when dosing exceeds bowel tolerance levels.
In fact, higher cell concentrations of vitamin C have been noted to kill cancer cells by US Govt researcher Mark Levine.
Please read:
http://www.michaelmo...forvitaminC.htmI don't understand why you would feel bad when taking 2,000 mg of vitamin C, but we are each unique.
By the way, I routinely take 3,000 mg of vitamin C several times per day and have for 46 years. But that's just me.
As I said, we are each unique.
Edited by mikey, 21 September 2013 - 02:48 AM.