Contraindications

Contraindications

High doses of vitamin C may cause nausea, flatulence and diarrhoea. When taking blood-thinning medication, the blood coagulation status should be monitored in case of high therapeutic vitamin C doses. If there is an increased risk of kidney stones, high vitamin C doses should be avoided (according to experts from 2-3g/day). People with a disorder of iron metabolism (haemochromatosis) should only take vitamin C after consulting their doctor or pharmacist.

High doses of zinc can reduce intestinal copper absorption.

As there are no studies on use during pregnancy, breastfeeding or in children, we recommend taking it in these cases only after consulting a doctor.