Blackmores ZinvitC combines 250mg of vitamin C with zinc and magnesium to support healthy immune system function and general wellbeing. It combines the benefits of vitamin C and zinc in one convenient supplement, supporting healthy immune function. Adults, including pregnant and breastfeeding women, should take 1 or two tablets daily with a main meal, or as professionally prescribed. Always read and follow the directions for use. If symptoms persist, consult your health professional. This supplement may only be of assistance if dietary intake is inadequate. It contains zinc, which may be dangerous if taken in large amounts or for a long period, and sulfites. If you have any pre-existing conditions, or are on any medications, always talk to your health professional before use. Some products should be ceased at least two weeks before any elective surgery, please confirm with your health professional.