HOW MUCH DO I NEED?

500mg a day should do you nicely. ‘The highest source is liver, and sweet potato is really high in vitamin A, too,’ Medlin adds – noting that its bright orange colour is down to the beta-carotene antioxidants that are converted to the active form of vitamin A by the body. ‘Spinach is also a great source, with about a third of sweet potato’s content, while cheese has about half that of spinach.’ Whack those three in an omelette and call it a day.