RTE’s Food and Drug Administration has issued a warning that vitamin C supplements can have adverse effects on the liver and kidneys, and could lead to an increased risk of liver cancer.
The FDA’s advisory is the latest warning from the agency after it was criticised last year by a number of experts over the amount of vitamin C that was being given to people with liver disease.
The FDA said that as long as people took the recommended amount of the vitamin they were “not at risk”.
However, the agency said that the maximum recommended daily dose of vitamin A is 3.7mg a day, and that as people take more, their risk of developing liver cancer increases.
Vitamin C supplements are often marketed as a way to help people stay healthy, but the FDA said it was not recommending that people take them because they were good for them or their health.
It said the most common side effects associated with vitamin C were skin irritation, stomach pain and bloating.
In a statement on Thursday, the FDA urged the industry to work towards a “vitamin C-free” market.
It said that although many of the products available now do contain vitamin C, the “most common adverse effects are gastrointestinal and renal, and have a tendency to cause dehydration and nausea”.
“Vitamin A supplements should be used in conjunction with other therapies for improving liver function, including vitamins C and E, zinc, magnesium, copper, iron and zinc.”