How Much Sodium Do You Actually Need in an Electrolyte Drink?
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Sodium is the number electrolyte brands fight over, and the marketing usually implies more is better. It is not that simple. The right amount of sodium in your electrolyte drink depends almost entirely on one thing: how much you are sweating. Match it well and you feel great. Get it wrong in either direction and you are either under-replacing or loading sodium you did not need.
Why sodium matters at all
Sodium is the primary electrolyte you lose in sweat, and it is central to fluid balance. It helps your body hold onto the water you drink and supports nerve and muscle function. When you sweat heavily and do not replace sodium, water alone can leave you diluted, still thirsty, and prone to cramps and fatigue. That is the case for high-sodium formulas. But it is a case built on sweat loss, not on a blanket rule that everyone needs a gram of sodium a day from a drink mix.
The range on the market
- Low (roughly 80 to 200 mg): Built for daily, low-sweat use. Enough to round out everyday hydration without adding to an already salty diet.
- High (roughly 500 to 1,000+ mg): Built for heavy sweating, endurance, heat, keto and fasting, and recovery, where large sodium losses need aggressive replacement.
How to find your number
Ask honest questions about a typical day:
- Are you visibly sweating for an hour or more? Hot outdoor work, hard training, saunas. If yes, you are in higher-sodium territory.
- Do you see salt residue on your skin or clothes after sweating? That is a sign you are a saltier sweater and lose more sodium.
- Or is your day mostly indoor and moderate? Then a big sodium dose is solving a problem you do not have, and a lower-sodium, potassium-forward mix fits better.
Thryve makes both, on purpose
Rather than force one sodium level on everyone, Thryve offers two tools:
- Daily, low-sweat: Hydra Max at 80 mg sodium and 700 mg potassium, zero sugar. The potassium-forward daily baseline for people who are not sweating hard.
- Heavy-sweat and recovery: Replenish at 800 mg sodium, sized to match real sweat losses on hot days, hard workouts, and sauna sessions.
The smart approach for many people is to keep both and choose by the day. Light day, reach for the lower-sodium daily mix. Sweaty day, reach for the higher-sodium one. Your sodium intake should track your sweat, not a marketing number.
The bottom line
There is no single correct sodium dose for an electrolyte drink. There is a correct dose for your day. Base it on how much you sweat, lean potassium-forward when you are not sweating much, and step up the sodium when you are.
Compare Replenish and Hydra Max →
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.