Acne lesions are caused by an excess of sebum, an oily substance produced in excess by a combination of testosterone and a ‘growth factor’ (IGF-1). This growth factor is made in excess by your body when the supply of amino acids is high. Which food is most likely to cause an acne breakout when eaten regularly?

Studies have shown that carotenoids offer some protection against ultraviolet light-induced damage to skin that can make it look aged and increase skin cancer risk. Which of the following dietary changes would you expect to offer this benefit?