A purple potato that growers say is healthier than the standard variety is going on sale in UK supermarkets.
The Purple Majesty has a distinctive deep colour and contains up to 10 times the level of antioxidant, anthocyanins, compared with white potatoes.
It was developed at Colorado State University from a traditional variety.
An initial crop of 400 tonnes of the variety will go on sale in Sainsbury's stores across Scotland and the south-east of England this week, with a larger yield expected next year.
Albert Bartlett has been working with Queen Margaret University in Edinburgh and the Scottish Crop Research Institute to determine what health benefits there could be from eating the Purple Majesty.