Go Healthy Go Selenium 150mcg is a trace mineral which acts as a powerful antioxidant. Levels of Selenium are low in New Zealand soils, increasing the need for Selenium supplementation to avoid deficiency. The maximum allowable dose in New Zealand for dietary supplements is 150mcg. Potent antioxidant. Supports the immune system. Precautions Discontinue use at least 2 weeks prior to surgery. Not to be taken during pregnancy or lactation. Always read the label. Take only as directed. Medicine Interactions: Do not take if on anti-coagulant or anti-platelet medication without medical advice. If taking prescription medication or if in doubt, consult your Healthcare Professional.