Heat · Sweat · Hydrate · Recover

Best Electrolytes for Sauna Recovery

A buyer's guide that teaches you how to choose: the five things to check on any electrolyte label, what to be careful with, and how our own formula lines up against that checklist.

Most electrolyte advice tells you what to buy. This post does the opposite: it gives you the criteria first, so it's useful even if you never buy from us. Then we show, briefly and factually, how our formula lines up against each point.

The Short Answer

The best electrolyte for sauna recovery has meaningful sodium (several hundred milligrams per serve), plus potassium and magnesium, in a light, easy-to-absorb drink. Skip formulas built mainly on sugar or maltodextrin, and check for artificial sweeteners and colours if you care about a clean label. Match the dose to how much you sweat.

Why Sauna Recovery Needs a Different Electrolyte

Sauna sweat is fast and heavy, and you're usually not eating or drinking while it happens. Most electrolyte products are designed for the opposite situation: sipping a carbohydrate drink during sport. That's why a sauna calls for a different kind of electrolyte, one built around fluid and sodium rather than fuel.

Plain water has a place, but Dr Stacy Sims points out that it absorbs slowly and can pull sodium and water into your gut, which doesn't help hydration. Adding the right amount of sodium to your fluid helps your body hold on to it. The question is how much, and what else is in the drink.

We've covered the basics in Why You Need Electrolytes After Sauna and Water vs Electrolytes After Sauna, so we won't repeat them here. This post is about choosing one.

The 5-Point Label Checklist

1. Sodium you can actually see

Sodium is the electrolyte you lose most of in sweat, and how much varies hugely between people. A review of sweat testing puts whole-body sweat sodium at roughly 230–1,600mg per litre. In a dataset of 1,303 athletes, endurance athletes averaged about 1,200mg of sodium an hour. That's exercise data, not sauna data, but it shows why a label with only a trace of sodium won't go far. Look for several hundred milligrams per serve.

Dr Stacy Sims suggests about 360–400mg of sodium per 16 oz as an everyday benchmark for rehydrating after training or sauna. Heavy sweaters often need more, which we explain in Why Heavy Sweaters Need More Sodium. Our posts on why high-sodium electrolytes matter and how much sodium you lose in a sauna cover the rest.

2. Potassium and magnesium alongside it

Sodium works with other minerals. Sims describes sodium and potassium as the critical electrolytes for fluid transport. Magnesium is also lost in sweat and is commonly included in electrolyte formulas. A label that lists all three, with amounts, tells you more than one that just says "electrolytes".

3. Light, not syrupy: little or no sugar, no maltodextrin

Concentration matters. Sims explains that drinks that are too concentrated, such as high-carb mixes (including maltodextrin and other modified starches), sugary drinks or high-fructose blends, slow fluid absorption and often cause bloating or cramping. She points to lighter, hypotonic drinks that stay below the concentration of your blood. After a sauna you need fluid and sodium, not a sugar load. A small amount of sugar can help absorption, and some formulas include it by design, but it shouldn't be the main ingredient.

4. A clean label: no artificial sweeteners, flavours or colours

This one is about preference. If you'd rather not drink artificial sweeteners, flavours or colours, check the ingredients list for them. Real fruit powder is an easy sign to look for.

5. A dose you can match to your sweat

Not every session needs the same amount. A light sweat after a short sauna needs far less than two hours in a hot, dry cabin. Choose a format you can scale: a half serve on light days, a full serve after a big sweat.

How to Read the Panel in 30 Seconds

Words like "hydration", "clean" or "electrolyte" on the front of a pack aren't measurements. The nutrition panel on the back is. A quick routine:

1. Find the serving. Check what counts as one serve (a stick, a scoop, a tablet) and whether the numbers are per serve or per 100g.
2. Read the sodium line first. Is it hundreds of milligrams, or a trace?
3. Scan for sugar, maltodextrin and sweeteners. They're usually near the top of the ingredients list if there's a lot of them.
4. Look for potassium and magnesium amounts. A list with numbers beats a list without.

It takes half a minute, and it works on any brand, including ours.

What to Be Careful With

• Sugar-heavy sports drinks. Fine for fuelling long exercise, not ideal as a sauna default.
• Very low-sodium "hydration" waters. They taste fine, but a trace of sodium won't replace much.
• Salt tablets without fluid. Sims cautions against loading up on salt or electrolyte tablets, and sodium works best alongside water.
• Fizzy or concentrated mixes. They can sit heavily in the gut when you're already warm.

Electrolyte Drink vs Sports Drink vs ORS vs DIY

How We Built Saunabodi Against This Checklist

We designed our formula around the five points above. Here's how it lines up:

1. Sodium: 700mg per stick.
2. Potassium and magnesium: 250mg potassium and 60mg magnesium per stick, as an ORS-inspired blend.
3. Light, not syrupy: 0g sugar and no maltodextrin.
4. Clean label: made with real fruit, with no artificial sweeteners, flavours or colours. It's also vegan, keto-friendly, and gluten-, soy- and dairy-free, with no fillers, and it's third-party tested.
5. A dose you can match: one stick per serve, mixed as directed on the pack. On light days, half a serve or plain water is enough.

The formula also includes vitamin C, L-citrulline, taurine and glycine as ingredients. We'd rather you check us against the checklist than take our word for it.

How to Use Electrolytes Around a Sauna Session

• Before: start hydrated. What to Drink Before a Sauna Session covers how much and when.
• After: rehydrate within the first hour. A Saunabodi Electrolytes stick in water is a simple way to do it.
• Heavy days: after a long or hot session, or if you lost 1kg or more on the scale, a full serve plus extra water makes sense.

Whatever you choose, mix it as directed on the pack. Making a drink stronger than intended makes it more concentrated, not better, and concentration is exactly what slows absorption. Sip it rather than gulping it, and keep some plain water going alongside. If you feel dizzy, confused or unwell after a session, treat that as a reason to stop and cool down, not to add more of anything.

For the full routine, see The Heat Recovery Protocol.

Who Should Check With a Doctor First

Talk to your doctor before using a sauna or adding extra sodium if you have a heart condition, low or high blood pressure, a kidney condition, if you're pregnant, or if you take medication that affects fluid or blood pressure.

The Bottom Line

Look for sodium first, keep it light and clean, and match it to your sweat. If you want a formula built against that checklist, Saunabodi Electrolytes are one option, and the cards below will help you pick a flavour.

Stay Hot. Stay Hydrated.

Shop SAUNABODI Electrolyte Mix

No maltodextrin. 0g sugar. Made for the hour after heat.

30 stick packs Mixed Berry Made with real fruit, with no added sugar. Shop Mixed Berry → 30 stick packs Tropical Passion No artificial flavours, colours or sweeteners. Shop Tropical Passion → 30 stick packs Pink Lemonade Vegan, keto-friendly, gluten-, soy- and dairy-free. Shop Pink Lemonade → 12 stick packs · try all three Variety Box Try all three flavours. Third-party tested. Shop Variety Box →

Sources

• Baker LB. Sweating rate and sweat sodium concentration in athletes. Sports Medicine, 2017
• Barnes KA, et al. Normative data for sweating rate, sweat sodium concentration, and sweat sodium loss in athletes. Journal of Sports Sciences, 2019
• Dr. Stacy Sims: How much sodium and potassium do you need to rehydrate? (YouTube)
• Dr. Stacy Sims: Hydration for Active Women
• WHO and UNICEF: Oral rehydration salts, production of the new ORS (2006)

← Back to The Heat Code

Stay Hot. Stay Hydrated. We live in the heat.