Posted by Team Tune
on July 04, 2026
Nuun's fizzy tablet was a genuinely clever piece of design. A tube in your gym bag, a tablet in your bottle, thirty seconds of fizz, done. For getting endurance athletes off sugary sports drinks in the 2010s, Nuun deserves real credit.
The design constraint is the tablet itself. A small effervescent tablet can only physically carry so much mineral content, and it shows in the numbers.
The labels, side by side
| Per serving | Tune Current (1 stick) | Nuun Sport (1 tablet) |
|---|---|---|
| Sodium | 500 mg | 300 mg |
| Potassium | 330 mg | 150 mg |
| Magnesium | 220 mg, three forms | 25 mg (oxide) |
| Chloride | 1,060 mg | 40 mg |
| Vitamin C | 500 mg | none |
| Vitamin D3 | 25 mcg | none |
| B vitamins | 6, methylated and bioactive | none |
| Trace minerals | 75+ | none |
| Sugar | 0 g | 1 g |
Numbers from published labels at time of writing. Verify before purchasing, formulas change.
25 mg of magnesium is a rounding error
We keep returning to magnesium in this series because it is the mineral Americans most consistently miss, and the one the category most consistently underdoses, as our audit in The Magnesium Gap lays out. Nuun Sport's 25 mg is about 6% of your daily value, and it comes as magnesium oxide, the cheapest and most poorly absorbed form. It is present on the label but absent in effect.
Tune Current's 220 mg is nearly nine times that, from three deliberate forms: bisglycinate, malate, and ionic magnesium from inland seawater concentrate.
Doses across the board
The pattern repeats down the label. Nuun's 300 mg of sodium and 150 mg of potassium are light for anyone actually sweating. There are no vitamins, no trace minerals, no antioxidants. Nuun Sport is, by design, a low-dose electrolyte top-up with excellent portability.
Current's stick format holds 7 grams of actives, which is what lets it be a complete nutritional foundation instead of a top-up: multi-mineral, multi-vitamin, hydration, and super antioxidant support, with 500 mg vitamin C, vitamin D3, a six-vitamin B complex in bioactive forms, 75+ trace minerals, and the VitAlign blend, chosen so the cofactors travel with the minerals they activate.
Fizz vs powder, honestly
Tablets win on one thing: they will not spill in your bag. Sticks win on everything else, including dose ceiling, no waiting for the fizz, and no effervescent binders. Both travel fine. Pick your ergonomics, but know what the tablet trades away to stay a tablet.
Who should pick which
Pick Nuun if: you want the lightest possible electrolyte top-up in tablet form and you are covering minerals and vitamins elsewhere.
Pick Tune Current if: you want one stick that is a full nutritional foundation: half your daily magnesium, meaningful electrolytes, a complete vitamin layer, trace minerals, and antioxidants working together.
FAQ
How much magnesium is in Nuun?
Nuun Sport contains 25 mg per tablet, as magnesium oxide. Tune Current contains 220 mg per stick from three forms.
Is Nuun enough for heavy sweat sessions?
At 300 mg sodium per tablet, many athletes use two or more tablets. Check your sweat rate and dose accordingly.
Does Tune Current fizz?
No. It is a fine powder that dissolves in 12 to 16 oz of water without effervescence.
Keep exploring: see how 8 electrolyte powders compare, dig into the magnesium data, or make Tune Current your daily foundation.
Current is a dietary supplement. These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any disease.
