CBD oil, or cannabidiol, has been available in the UK at Holland and Barrett stores since the start of the year, proving popular among the general public.
The retailer has been selling the oil for ÂŁ19.99 and over the last few weeks sales have increased by 37 per cent.
The number of people using cannabidiol (CBD) oil in Britain has rocketed from 125,000 to 250,000 in the past 12 months, according to the Cannabis Trades Association UK.
Because of its success, the high street health shop has now launched CBD infused water.Â
Love Hemp Water, the first functional spring water in Europe to be infused with cannabidiol, launched in stores on Monday 25 June.Â
Each 500ml bottle of Love Hemp is sugar free and contains 2mg of natural hemp extract.Â Hemp is naturally high in CBD.
But what should CBD infused water be used for, what are the risks of CBD products, and what are the benefits of taking it?
Dr Andrew Thornber, Chief Medical Officer at Now Patient, said: â€śCBD has been shown in many studies to alleviate the symptoms that are associated with many medical conditions including inflammation, muscle pain, nausea and anxiety and have benefits for people with Alzheimerâ€™s Disease, Parkinsonâ€™s Disease, MS, pain, anxiety, depression, cancer and diabetic complications.â€ťÂ
But Dr Thornber advises itâ€™s still early days with research into CBD.Â
He said: â€śThe exact potential to help patients suffering with ailments or health conditions is still not certain. Even though the water has very small amounts of CBD in it, I would advise those drinking it, to proceed with caution.â€ť
Tony Calamita, co-founder of Love Hemp Water, said: â€śItâ€™s great to see mainstream retailers such as Holland & Barrett starting to stock CBD products.
â€śThereâ€™s a growing understanding of the wide ranging benefits of cannabis oil to health and well-being which is why we have launched the first every day hemp water product.
â€śEach 500ml bottle of Love Hemp is sugar free and contains 2mg of natural hemp extract. It tastes great and is naturally hydrating.Â
â€śWeâ€™re proud to be starting a hemp water revolution.â€ť
CBD oil is extracted from the resin glands on cannabis buds and flowers.
Itâ€™s a type of cannabinoid which are the chemicals naturally found in marijuana plants, and itâ€™s usually mixed with a carrier oil, like MCT (a form of coconut oil).
There are different variations in strength available from Holland and Barrett – 2.75 per cent toÂ fiveÂ per cent, but while CBD oil comes from the cannabis plant, CBD does not create any form of intoxication.Â
Another cannabinoid, THC, causes this, but this substance is illegal in the UK.
In June, Charlotte Caldwell, whose 12-year-old son Billy has a severe form of epilepsy that can give him up to 100 seizures a day, was stopped by officials at Heathrow after trying to â€śopenly smuggleâ€ť illegal cannabis oil into the country from Canada.