Precision Fuel & Hydration was founded in the UK by sports scientist Andy Blow and has a US store with prices in dollars. Its idea is simple: people sweat out very different amounts of salt, so the mixes come in different strengths. PH 1500, the strongest, has 1500 mg of sodium per liter, about three times a regular sports drink. There are tablets, drink mix packets and PF 60 carb drink mix with 60 g of carbs and 1000 mg of sodium per liter.
A free online sweat test helps pick the right strength, which is handy for runners who cramp late in races. The brand says it rarely runs sales. Instead, loyal buyers earn points toward 10%, 15% and finally a lifetime 20% discount. That makes it better for steady long-term buyers than for bargain hunters. Low strength options exist for light sweaters.
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