Sauna hydration, Ireland
Electrolytes for sauna · Ireland
A hard sauna session pulls out more fluid and salt than most gym workouts, and plain water puts back only part of it. Set up your session below and we'll show you what you actually lost, and which electrolyte on the market replaces it.
Every product on this page is a good product built for a different problem. LMNT was made for endurance athletes and low-carb diets. Precision for cyclists counting grams on a long ride. AYA and Ultimate Electrolytes for a general wellness shelf. Not one of them was dosed for four rounds at 95 degrees.
Search for sauna electrolytes and you get running products with a sauna photo. So we're making the one that isn't: a sachet mixed for what heat actually takes out of you, with Irish Atlantic sea salt and nothing you don't need. Join the waitlist.
Heat sweat carries sodium at roughly the same concentration as exercise sweat, around 500 to 1,500 mg per litre depending on the person. Sitting still doesn't give you a discount.
After a hard session, sinking litres of plain water tops up fluid while the salt you lost stays missing. That matters most on long or back-to-back sessions. The light head when you stand up, though, is usually blood pressure rather than sodium. Heat widens your blood vessels, and it passes.
Get used to the heat and your body starts conserving salt. An acclimatised bather's sweat can carry a fraction of the sodium of someone going twice a year. That's why we ask how often you go, and it's why one number for everyone would be wrong.
Most tablets sit near 300 mg of sodium per serving, tuned for a bottle you sip over an hour of running. After four hard rounds in the heat the arithmetic doesn't reach.
Built from your session type, the number of rounds and the bench temperature, against typical sauna sweat rates of roughly half a litre per fifteen to twenty minutes of solid heat.
Fluid loss multiplied by a sweat sodium concentration of 1,150, 950 or 700 mg per litre depending on how often you bathe. Real values vary widely between people, anywhere from 500 to 1,500 mg per litre, so treat these as mid-range estimates, not measurements.
Most people replace a normal session's salt from food without thinking about it. Topping up matters most on long or back-to-back sessions, if you sweat heavily, if you already eat low-salt, or if you finish sessions with a headache or cramps.
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