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High Doses of Vitamin C Supplement Increase Blood Glucose Levels
According to the July issue of Diabetes Care, high doses of supplementary vitamin C may cause an unexpected elevation of blood sugar levels and false diagnosis of type 2 diabetes.
Donald R. Branch, PhD, reports the case of a 49-year-old, slightly obese man who took high levels of vitamin C, causing high fasting (121 mg/dl) and after-meal (220 mg/dl) blood sugar levels. The man, who had earlier been diagnosed as a potential candidate for type 2 diabetes based on his age, obesity and repeat elevated blood sugar readings, had taken 4,500 mg. per day of a synthetic, unsweetened vitamin C product for the past five years.
The patient was asked to discontinue the supplement and, after seven days, morning blood sugar averages dropped to 99 mg/dl. He then restarted vitamin C supplements in dosages of 4,500 mg. per day, and morning blood sugars rose to 110 mg/dl. He discontinued the supplement again and, after one week, blood sugars dropped to 79 mg/dl.
Branch says that elevated blood sugars, as a result of taking such a high dose of vitamin C, "...could result in a misdiagnosis of diabetes and/or additional, unnecessary testing, as in this case." He adds that "..vitamin C-induced production of glucose may interfere in the glucose monitoring of true diabetic patients."
Branch says that the man reduced his vitamin C intake to 1,500 mg. per day, and his blood sugars returned to the normal range.
Originally posted by Amanda5
Government websites will always disinform readers
Originally posted by Amanda5
I do my own research and utilise my own intellect - that is how I discern how something is a risk or not - not because an article somewhere tells me what to think.
Originally posted by Amanda5
Learn about your own body and know what you need to be healthy. Scaring people is a great disinformation tactic and fear is a great control tactic. Fear also creates stress and that also keeps people ill and searching for cures to their health issues.
Originally posted by Julie Washington
I think it would be more helpful to us when sharing your experience is if you would follow through with a new blood test after withholding the Lipo Vit C for a period of time to see what the results are, rather than guessing based on something you read on the internet.
Originally posted by crankyoldman
...your statement and the quote say "diagnose"...
Originally posted by crankyoldman
So it would be helpful if you elaborated on the symptoms that led you to the conclusion.
(...)
The patient refused to eliminate supplementary
VitC, but reduced the
amount taken to 1,500 mg/day. At this
dosage, multiple repeat testing of his
plasma glucose showed results within the
normal range. In the very few studies that
have been done, VitC up to 2,000 mg/day
has been shown not to result in an
increase in plasma glucose (1,8), and
these dosages are suggested to be beneficial
(1). Therefore, a dosage of
1,500–2,000 mg/day would provide the
expected beneficial effects of supplementary
VitC in diabetes (1,8,9), but may not
interfere with plasma glucose determinations
and confound a diagnosis or treatment
of this disorder.
This is the first report of supplementary
VitC in humans causing an unexpected
elevation of plasma glucose levels
confounding a diagnosis of type 2 diabetes.
However, this may be more common
if further examined, particularly in
borderline cases in which patients are taking
high-dose VitC supplements. To insure
accurate interpretation of the fasting or
postprandial plasma glucose measurements,
it may be advisable for individuals
taking megadoses of VitC to be asked to
refrain from ingesting supplementary Vit C
for at least 1 week prior to testing.
(...)
Originally posted by WhiteHat
One must love the consistency with which big pharma try to dismiss everything that seems to benefits us...
Originally posted by pacingmachine
Sigh. A little knowledge is a dangerous thing.Ascorbic Acid is chemically very similar to glucose.It competes with glucose for the same receptor sites to enter cells.If you have high glucose levels it makes it harder for the body to use vitamin c and inversely the higher your levels of vitamin c competing for the same receptor sights to enter cells the higher your blood glucose levels will be.Some test strips see higher AA or Ascorbate levels. Most primates do not have a metabolite that allows them to convert sugar to vitamin c. When you are insulin resistant you need to INCREASE your vitamin c intake because your cells have a greater degree of difficulty getting enough vit c.You have read some but not enough.One of the best arguments for lipo c is that it bypasses the normal metabolic pathways to enter cells.If I might suggest... "Ascorbate:The Science of Vitamin C" by S.Hickey and H. Roberts.
This book was written in 2004. The authors have since written additional material but, as all science, the books tend to add new information and a great deal of the basic work is in earlier work. Dr. Levy, a practicing cardiologist, has written an excellent book on high dosage vitamin c. Dr Linus Pauling, one of the greatest minds ever, has done a great deal to cause a reexamination of the work that has been done. As a diabetic myself,with an A1C around 5.1, who had a 4 way bypass last winter, elevated glucose levels don't mean take less vit c it means reduce my carb intake so the vit c doesn't have to compete with unnecessary glucose.