Antoine, marathoner, 12 weeks of measurements
Paul Fournier
— WEEKLY EDITION · TUESDAY JUNE 9 —
He kept the DPD logbook for 84 days.
Antoine D., 38, marathon runner (3h12 PB), Lyon 6th. Purchased ELITE 9K in March 2026. He agreed to share his 47 DPD measurements over 12 weeks.
Measurements stable between 8,800 and 9,200 PPB across all 47 data points. Median: 9,050 PPB. No notable drift despite intensive use (3 cycles/day, moderately hard Rhone water at 22°f).
His subjective observations: clear recovery from week 4, deep sleep measured by Oura tracker (+34 min on average), tempo run times improved by week 8.
His conclusion: « The DPD kit allowed me to verify I wasn't buying empty promises. That's what convinced me to keep going. »
47 Antoine measurements · 9,050 PPB median · 12 weeks Tracking
« The best customers are those who measure. They're the ones who validate the method. »
Paul Fournier · HYDROGENYX Founder
