Prescott, who will be based in the USA, was previously vice president of Marketing and Applications at Probi AB, a Swedish probiotic company that had annualised sales of 604mln Swedish krona in 2018.
Prior to joining Probi, he spent four years as a global probiotic product manager at Dupont, the US conglomerate that merged with Dow Chemical in 2015.
ProBiotix is OptiBiotix’s division that is focused on the development of probiotics - healthy bacteria - to reduce cardiovascular risk.
"Stephen's experience and track record of growing probiotic sales in international markets bring specialist commercial and industry expertise to OptiBiotix's wholly- owned probiotic subsidiary, ProBiotix Health Ltd,” said Stephen O'Hara, the chief executive officer of OptiBiotix.
“His network of contacts provides access to international markets which we hope will continue to drive revenue growth of LPLDL in supplement, food, and pharmaceutical products around the world,” he added.