The harmful effects of excessive consumption of vitamin C obtained solely from food sources have not been observed so far. The body defends itself against an excess of vitamin C by limiting the absorptive capacity of the intestines and excreting the excess with urine.
Synthetic vitamin C used in supplementation is generally well tolerated by the body. Its ADI (acceptable daily intake) is 15, which means that a person weighing 70 kg could consume 1050 mg of ascorbic acid every day throughout their life without significant systemic disturbances.
The risk of exceeding vitamin C increases when regularly supplementing with doses above 2000 mg, which can manifest primarily as gastrointestinal complaints, such as:
- stomach pain
In the case of chronic overdose, the risk of kidney stones also increases.
The usual therapeutic dose of 100 mg taken in doses of 3 times a day is beneficial for the body because it increases iron absorption. However, mega-doses can cause diarrhea, promote the formation of kidney stones, and cause unfavorable adaptation to large doses. Moreover, it is believed that they may increase the need for vitamin E and enhance the toxicity of some drugs.
Check for vitamin C without preservatives and sourced only from the best natural sources, providing the widest range of action and the highest absorbability.