View Full Version : Safe amounts for vitamin C?
04-03-2007, 02:28 PM
Hi guys, I've got multivitamins which gives me 100% RDA of vit C. However I've got separate vit c pills which provide 417% of RDA.
If i take both together i'd have 517% RDA of vit C. Are their any known side effects or could this be harmful in any way?
04-04-2007, 01:51 AM
No, there is no such thing as "over-dosing" when talking about Vitamin C. The body will use the amount it needs, and you will urinate any excess. Taking both together is completely safe!
04-04-2007, 03:46 AM
I'm not 100% sure if thats correct, I know taking an excess of Vitamin 'A' can cause things such as birth defects ect. and I'm pretter sure another vitmain from dietry fibre (folute?) can have serious conditions too. I'm not sure on the excate info but 500% more than the RDA is quite a lot; however, consider you are probably a lot bigger than the average person.
Maybe a quick search on google?
04-04-2007, 12:42 PM
Yeh, I'll have a look and post my findings.
04-04-2007, 05:40 PM
Most mammals can manufacture their own vitamin C. Humans and a few other species seemed to have lost this ability some where in the evolutionary process. Adult goats are known to make 13g of Vit C when healthy for example.
The RDA for Vit C is the bare minimum needed to stave off scurvy and is woefully inadequate for anyone, especially bodybuilders.
I take 3 grams on most days and 6 grams whenever I work out. When I'm sick I might take a few grams more a day but not too much more.
04-04-2007, 07:00 PM
Oh well even my 417% pill is only 250mg.
04-04-2007, 07:29 PM
I take about 3g per day above what my multi gives me and I've had no problems.
04-09-2007, 01:01 AM
I read a article in Men's Health awhile back about the risks of overdosing on vitamin C. I went skimming through a couple of them but couldn't find it. I am pretty sure it puts you at a higher risk of kidney stones is you exceed about 800%. If anyone knows about this article please correct me on the details.
04-09-2007, 09:21 AM
its water soluble so excess is excreted. i wouldn't worry too much
04-15-2007, 01:30 AM
there will no problems, i have been taking 2000mg per day yes 2000, i'm a medical student and there is no side effects, just like the guy that posted in the first reply your body will use what is needed then it will pass out your urine, but if you noticed how often were you sick, taking all that vit.c it is not likely of you getting a cold
04-17-2007, 06:55 PM
[ QUOTE ]
Always behind the times for athletes, the RDA for vitamin C is 60 mg. It has been suggested (11) that this is based on an inaccurate and antiquated method for calculating vitamin C requirements.
Dosages given to athletes have been reported to be 2Ė12 grams daily. A consensus on reviews has shown complete safety with dosages of vitamin C of 1Ė5 grams daily (6, 38).
For musculoskeletal healing, dosages of 500Ė1,000 mg, 2 to 4 times daily, have been taken (6) in the form of ascorbic acid.
[/ QUOTE ]
04-24-2007, 08:29 PM
as its been stated already, vitamin c is water soluble, you piss out what your body doesnt use.
05-05-2007, 01:10 PM
You can overdose with vitamin C, but only if you take a very large bolus dose. If you spread it out throughout the day, your body will be able to excrete anything it doesn't need.
You can overdose with absolutely anything (even water) if you take to much of it.
05-05-2007, 02:41 PM
Yes, itís been said that Vitamin-C is water soluble. That is opposed to fat-soluble, like Vitamins A & E. Your body will store those excesses away in its fat stores, so you really can overdose.
But with water-soluble like vitamin C (and even protein) I think that kidney stones are the absolute worst-case scenario. And that would only happen if you are predisposed to kidney stones and taking more of the supplement than you require.
Thatís why itís important to look at the research out there and make sure you are getting the right amount of supplements to match your activity/stress levels & goals. Too little offers no gain. Too much could catch up with you. But not in the short term. Just be aware of what you do and what you take. If they are in balance, all should be well.
07-06-2011, 08:49 AM
Actually, vitamine C overdose (10 grams) is associated with diarrhea and nausea.
07-06-2011, 04:04 PM
In addition to what has previously been stated, excess antioxidants prior to an intense strength training session can decrease gains from training because they decrease oxidants which act as second messangers. The antioxidant literature is a bit hard to decifer, but from what I understand you need some oxidation. Too much oxidation is bad and too little oxidation is bad also.
08-01-2011, 11:04 PM
isn't it possible that too much of one anti-oxidant disturbs the anti-oxidant balance, since all work together ... ??
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