Vitamin C is an essential water-soluble vitamin that has a wide range of functions in the human body, its main function being to act as an excellent antioxidant.WITH ADDED ROSEHIP - DUAL-STRENGTH IMMUNE SUPPORT - HIGHLY BIOAVAILABLE 100 capsules | 100 portions Vegetable capsules Vitality range Vitamin C is an essential water-soluble vitamin which has a wide range of functions in the human body, its main function being to act as an excellent antioxidant.