Ever been badgered by your parents as a child to eat more carrots?’ It’s good for your eyesight’ they said. This is age-old advice that has been given to children for generations, but is there any scientific truth behind it? In fact, there is. The answer – vitamin A. But have you ever wondered what this nutrient actually is, why we need it and where we can get it from? What is vitamin A? Vitamin A is a group of…