Dr Klaus Schaefer, a general practitioner, argues that the ranges of risks from long-term use of the highest dose have not been adequately studied. He insisted that with the study so far, medium doses are safer.
“When it comes to guarding against illnesses, many people swear by vitamin C – and rightly so. “We need it for our body’s defences, because it stabilises immune system cells,’’ he said.
Schaefer warned that overdoses of the vitamin, also known as ascorbic acid, are known to harm the kidneys. “Overdose of Vitamin C acidifies the urine,’’ which can lead to kidney stones.
The physician therefore advised against taking the maximum dose of vitamin C supplements as given on the tablets’ label. He said a balanced diet was the best way to prevent a vitamin C deficiency.
Schaefer pointed out that foods rich in vitamin C included citrus fruit, broccoli and sauerkraut should be consumed.
“Fruits and vegetables are not only an ideal source of vitamins, but also contain dietary fibre and dietary minerals.
“They’re healthier for the body and have no adverse side effects,” he said.
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