Vitamin C contributes to normal collagen formation for the normal function of teeth and skin and bones and contributes to then normal function of the immune system. Eat a healthy variety of differently coloured vegetables and fruits each day - at least 5 portions. A refreshing green tropical juice made from carefully selected fruit and veg. We've pressed. 1/3 pineapple, 5 apples, 1/2 mango, 1/2 passion fruit and a handful of kale per carton. 150 ml makes up 1 of your 5 a day.