Solgar Ester-C Plus Immune Complex (60 Softgels) is specially formulated to help maintain immune system function throughout the year. Vitamin D is often called the 'sunshine' vitamin, created as a by-product of the interaction of sunlight and the skin. When sun exposure is diminished, especially in the winter months, Vitamin D deficiencies may occur if not bolstered by nutritional intake.This comprehensive formula contains Vitamins A, B6, B12, C and D3, alongside Folate and Zinc. These help bolster the immune system for up to 24 hours whilst been gentle on the stomach. Ester-C plus is retained by White Blood Cells for 24 hours, twice as long as standard Ascorbic Acid. Dairy-free, Gluten-free and Soya-free. No artificial colours, flavours, or preservatives. Directions of use: As a food supplement for adults, take 2 softgels, preferably at a mealtime, or as directed by a healthcare practitioner. Do not exceed directions of use. Read the label fully before consumption.