Plums are a medium-sized stone fruit. The most popular variety has a dark purple-red skin with yellow flesh inside, you can also find plums that are green-yellow. All varieties have a stone in the centre of the fruit which is not edible. When dried, plums are known as prunes.
Plums are packed with plant compounds which have antioxidant properties, this means they help prevent oxygen from reacting with other chemicals and causing damage to cells and tissues. They are especially rich in anthocyanins, the compounds also responsible for the plum’s dark coloured skin. In fact, studies suggest plums are richer in these protective compounds than other fruits including peaches and nectarines.