The store, which opened this week, allows customers to participate in an in-store DNA test, taken by swabbing the inside of their cheek with a cotton bud.

The DNA collected is then used to give users a guide to which food items they should purchase based on their genetic predisposition to a variety of factors ranging from risk of obesity, high blood pressure or the time it takes them to metabolise caffeine, within an hour of having their cheek swabbed.