Plain water doesn't cut it. Not in the sauna.
A 4-minute breakdown of why standard electrolytes fail in 174°F heat — and what to drink instead.
"If you sauna 4× a week and you're still drinking plain water, you're not hydrating. You're depleting."
Chase, founder of Sauna Method — 4× a week in the heat.
A 30-minute session at 180°F pulls about a liter of fluid out of your body. Roughly 1,000mg of sodium leaves with it — comparable to a half marathon, except you sit still while it happens.
Plain water doesn't replace that. The Beverage Hydration Index study (Maughan et al., 2016, American Journal of Clinical Nutrition) showed water scores 1.0 on post-exercise hydration retention. Electrolyte solutions score 1.5 or higher.
Which means every glass of water you drink after a sauna session leaves you in a deeper deficit than you started in. The water dilutes the sodium you have left, your kidneys flush more out, you end up worse than if you'd done nothing.
This isn't theory. It's basic electrolyte physiology applied to a use case nobody formulated for. Here's what's actually happening — and how to fix it.
1. Sauna sweat ≠ gym sweat
LMNT, Liquid IV, Gatorade — all formulated for athletic workouts. Moderate sodium loss, shorter duration, different mineral ratios.
Sauna sweat is the opposite. Concentrated, fast, mineral-heavy. Sodium loss per minute is higher. Potassium and magnesium losses skew differently. Most products underdose both for this use case.
2. The timing matters more than the dose
Post-sauna electrolytes are reactive. By the time you drink them, your body has been in deficit for 30+ minutes. Cramping risk, plasma volume drop, recovery already compromised.
Pre-sauna loading reverses the equation. Same minerals. Same dose. Just consumed 20-30 minutes before the heat starts. Your body enters the session in surplus, not deficit.
3. The symptoms aren't the heat
Post-sauna fatigue where you need a nap? Sodium depletion. Nighttime cramping? Potassium and magnesium not replaced. Headache that shows up 2 hours later? Plasma volume contraction.
You can't be in a sustained mineral deficit AND get the adaptive benefits of heat exposure at the same time. The body prioritizes survival when minerals run low. Adaptation is what happens after that.
4. The fix is one step, 30 seconds
One scoop of Sauna Method in a glass of cold water, 20-30 minutes before your session. That's the entire protocol.
1,000mg sodium. 400mg potassium. 100mg magnesium glycinate. 250mg vitamin C. Pink Lemon flavor. No sugar. No artificial colors. No chalky aftertaste. Calibrated specifically for sauna heat exposure, not the gym.
1,000mg sodium · 400mg potassium · 100mg magnesium glycinate · 250mg vitamin C. Pink Lemon flavor. 30 servings.
"I sauna 4× a week. I built this because nothing on the shelf was calibrated for what I was doing."
— Chase, Founder
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