precision fuel & hydration is a dorset, england company built on one idea: your body is not the average body, so you should stop fueling like it is. founder andy blow was a sports scientist and elite triathlete who kept cramping and, more than once, ended up with hyponatremia, the dangerous drop in blood sodium that comes from drinking to a generic plan instead of your own numbers. the standard advice was the thing hurting him. so in 2011 he built a company around measuring the individual first.
the tool at the center of it is a sweat test, using technology first developed to diagnose cystic fibrosis, that tells you how much sodium you actually lose. from there the line is simple on purpose. electrolytes in multiple strengths so you can match your losses instead of guessing, and a fuel range, the pf 30 and pf 90 gels, that fixed the two things blow thought gels got wrong: syrupy taste and the numbers buried in tiny type on the back.
what we like is the restraint. precision is not pro-maximum on anything. their line on sodium is appropriate, not high, and the same goes for carbohydrate, in a category that mostly just wants to sell you more. it is the rare fueling brand that will tell you that you might need less than the person next to you.
the approach earned its credibility quietly, through pro sport first, nba and nfl teams and more than twenty major league baseball clubs, before it reached endurance athletes. still self-funded, still run by the two partners who once remortgaged their houses to keep it alive, one of whom, jonny tye, took over as ceo at the start of 2026.
read the full precision story on syndicate, or dial in your own numbers direct.
