Natasha Bowes drank it as a child growing up in Russia and, after a sixteen-year career in financial services, she decided to try selling the drink in the UK and Western Europe.

Natasha started Biotiful in 2012, and her business now sells 300,000 bottles of kefir a week. It has proved a hit amongst customers from Eastern Europe and the Middle East and amongst health food enthusiasts because of the strains of bacteria it contains.

However, says Natasha, her firm might have grown even faster had she not spent the first two and a half years trying to run Biotiful on her own.

“If I had taken on staff earlier,” she says, “I could have got to the £1 million sales mark in half the time.”