Juice Doctor is a new, natural fruit drink backed by Olympic champion Sir Steve Redgrave designed to combat dehydration, which it says affects two out of three people.

The company has worked with nutritionists to develop a formulation which improves water, vitamin and mineral uptake by the body. The drinks are made from a specially formulated blend of spring water, natural fruit juices, vitamins and rehydrating minerals, and come in three flavours – lemon, tropical and pomegranate.

Sir Redgrave said: “Our bodies lose over two litres of water a day just by going about our daily lives.”

Juice Doctor is being rolled out nationally during the next year following a successful pilot in more than 100 independent retailers and delis in London and the south-east.