Glen O'RourkeFebruary 09, 2016First Endurance, OptygenHP, Optygen, Performance, Supplements, Racing1 Comment OptygenHP by First Endurance When I was asked to take 4 little red pills a day of OptygenHP with the promise of them making me ride faster I jumped at the chance. I blame Dave Brailsford, the legendary sports director for Team SKY, for his mantra of marginal gains. Glen O'RourkeFebruary 09, 2016First Endurance, OptygenHP, Optygen, Performance, Supplements, Racing1 Comment