Radnor Hills Mineral Water Ltd. has collaborated with Pro Athlete Supplementation (PAS), a company created by elite sports nutritionist Jon Williams and Olympic Gold medallist Darren Campbell to bring to market an exciting new isotonic sports drink called PRO ISO.


PRO ISO has been developed by Jon Williams, the sports nutritionist whose company, PAS supply the elite of professional sport, all screened and approved by Informed Sport. Jon was Darren’s nutritionist when he won his Olympic Gold, and during this period they became good friends. When Darren retired from athletics they decided to set up a business designing and manufacturing sports nutrition products. They soon realised the opportunity to develop a ready to drink isotonic.

‘Based on research showing coconut water (naturally high in potassium and low in sodium) to be equally effective for hydration as isotonic, we have created an isotonic formula that provides energy and hydration without adding excess sodium to the athlete’s diet. We believe we have also produced a drink that is more suited for consumption during training and competition. Our teams and athletes all said they wanted a lighter less sickly isotonic than currently available, and PRO ISO is just that.’ Jon Williams BSc, WRU National Squad Nutritionist

Jon approached Radnor Hills in 2013 to ask him to help bring his unique and revolutionary isotonic formula to the market place.

‘We couldn’t be more delighted to manufacture and bring to market this unique product that so far has only been available to elite athletes. Jon and Darren’s knowledge and experience in this sector is second to none, and I look forward to everyone enjoying the benefits of PRO ISO’. William Watkins, Radnor Hills MD

Whilst this revolutionary and great tasting isotonic drink helps keep you rehydrated, PRO ISO also helps delay fatigue, ensuring you can keep on performing, for longer. PRO ISO sports drinks come in Forest Fruits, Orange and a Zero calorie version PRO ZERO.

PRO ISO has been devised to drink during sport, developed by a top nutritionist and the highest level of sportsman; it’s for anyone serious about sport.


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