Omega-3 Krill Oil, which launched this month in the UK, is the first move into the vitamins, minerals and supplement category from the owner of brands such as Nurofen and Cillit Bang.
The Interpublic Group-owned agency won the retainer following a competitive pitch against an undisclosed number of agencies.
GolinHarris London's healthcare team is rolling out a creative PR campaign, highlighting the role of omega-3 for optimum heart health, which is supported by celebrity brand ambassador Gabby Logan.
As part of the campaign, an expert panel including media doctor Ellie Cannon and celebrity fitness trainer James Daly will encourage the core audience of women over 45 to take a more proactive approach to staying healthy.
While the win marks the first time that GolinHarris has worked with RB, Virgo Health – the agency GolinHarris acquired in 2012 – has carried out work on Reckitt Benckiser brands Durex and Scholl.
GolinHarris’ London healthcare practice launched in 2013, following the integration of Virgo Health into the GolinHarris group.
Mark Pearson, category marketing director healthcare, Reckitt Benckiser, UK, said: "The UK launch of MegaRed marks Reckitt Benckiser's first move into the vitamins, minerals and supplements category.
"GolinHarris demonstrated profound knowledge and experience and we are delighted to have the team on board. MegaRed is the number one omega-3 supplement in the US and our ambition is to replicate that success here in the UK."