You're comparing two electrolyte labels. One brags about a huge sodium number on the front of the pack; the other lists something more modest. The instinct is to assume more sodium means more hydration. But sodium is only half the story. The sodium-to-potassium ratio in your electrolyte drink tells you whether a formula is actually balanced for the way your body moves fluid — or just chasing the biggest number on the shelf.
Sodium and potassium do different jobs
These two minerals are partners that work on opposite sides of every cell membrane, and that's the whole point of pairing them.
Sodium is the main electrolyte outside your cells. It's the principal extracellular cation that governs how much fluid your body holds onto, and it drives sodium-coupled water absorption in the gut — the same mechanism behind oral rehydration therapy. In practical terms, sodium supports fluid absorption and retention. Drink plain water and a lot of it passes straight through; add sodium and your body is better able to hold onto what you drink. A randomized trial developing the Beverage Hydration Index found that beverages containing sodium were retained longer than plain water (Maughan et al., Am J Clin Nutr, 2016).
Potassium is the main electrolyte inside your cells — the dominant intracellular cation. Together, sodium and potassium run the sodium-potassium pump that maintains the electrical gradient your body depends on, which is why electrolytes support normal nerve signaling and muscle contraction (NIH Office of Dietary Supplements: Potassium). A drink that's all sodium and almost no potassium is only doing half the job.
Why "more sodium" became the trend
Somewhere along the way the category turned into a sodium arms race. Some of the most popular electrolyte mixes now pack around 1,000 mg of sodium against just 200 mg of potassium — roughly a 5:1 ratio, tilted hard toward sodium. Big numbers make for confident marketing.
Here's the non-obvious part: past a point, more sodium doesn't buy you more hydration. If a stick dumps a large sodium load into a small volume of water, that concentrated mix can actually slow how fast fluid leaves your stomach and crosses into your bloodstream. The sodium you added to help you absorb water starts working against absorption instead. That's why the amount of sodium matters far less than whether it's matched to enough fluid — and whether the other minerals are along for the ride.
What a balanced ratio looks like
Each burbo stick delivers 327 mg of sodium and 200 mg of potassium — a ratio closer to 1.6:1, deliberately more balanced than the sodium-forward crowd. That 327 mg sits at the sensible end of the range sports-nutrition guidance points to for an hour of real sweating: enough sodium to help you hold the fluid you drink, without megadosing it.
The formula rounds out the pair with 100 mg of magnesium as magnesium bisglycinate, which makes each stick an excellent source of magnesium at 24% of the Daily Value — a gentle, well-absorbed form, and magnesium supports normal neuromuscular function. Balance, not brute force, is the design goal. Naming a moderate sodium number instead of the loudest one on the shelf is a deliberate choice — it's what the physiology actually rewards.
How to read the sodium-to-potassium ratio on a label
When you flip an electrolyte drink over, look at both minerals, not just the headline sodium figure. A useful habit: check that there's meaningful potassium next to the sodium rather than a token amount. Most modern diets already skew sodium-heavy and potassium-light, so a drink that ignores potassium is reinforcing the imbalance most people already carry.
One rule holds no matter which drink you choose: mix each stick into a full bottle of water. More sticks should always mean more fluid, never a stronger, more concentrated drink — concentrating the powder is exactly what works against absorption. For everyday hydration, one stick in a full bottle does the job. On a hot day or a long sweaty session, roughly one stick per hour of continued sweating is a reasonable rhythm. Two sticks a day is comfortably fine and three is the practical ceiling; beyond that, take any extra sodium from food or a plain electrolyte rather than stacking more sticks. burbo is sweetened with OnoSweet, a zero-calorie form of Reb M, plus a trace of organic agave for flavor, so the drink stays calorie free while the minerals do the work.
The takeaway
Don't shop for the biggest sodium number — shop for balance. Sodium helps you absorb and retain fluid; potassium is its partner on the inside of every cell; and the ratio between them tells you whether a formula respects both. A moderate, balanced stick mixed into a full bottle of water will support hydration better than a sodium bomb ever could. That's the ratio burbo is built around.
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. How this article was researched and written: our editorial standards.