Posted by Team Tune
on July 04, 2026
Here is a strange fact about the hydration industry: the mineral Americans most consistently fail to get is the one most electrolyte products barely include.
Magnesium participates in over 300 enzymatic reactions: energy production, muscle and nerve function, blood sugar regulation, vitamin D activation, sleep architecture. National intake surveys consistently find that roughly half of Americans consume less magnesium than their estimated average requirement.
So we audited the labels of eight popular electrolyte mixes to answer one question: if you drink one of these every day, how much of the magnesium gap does it actually close?
The audit
| Product | Magnesium per serving | % of 420 mg adult male RDA | Form |
|---|---|---|---|
| Tune Current | 220 mg | 52% | bisglycinate + malate + ionic |
| Magna | 210 mg | 50% | L-threonate + malate + glycinate |
| Ultima Replenisher | 100 mg | 24% | citrate |
| Trace ZeroLyte | 80 mg | 19% | citrate |
| LMNT | 60 mg | 14% | malate |
| DripDrop | ~39 mg | 9% | citrate |
| Nuun Sport | 25 mg | 6% | oxide |
| Liquid I.V. | 0 mg | 0% | none |
| Gatorade | 0 mg | 0% | none |
Values from published labels at time of writing. Formulas change; verify current labels. RDA reference: 420 mg per day for adult men, 320 mg for adult women (NIH Office of Dietary Supplements).
Reading the spread
The category median sits around 50 to 60 mg, which is 12 to 14% of an adult male RDA. The two most famous names in hydration, Gatorade and Liquid I.V., contain none at all.
That means a typical person drinking a typical electrolyte mix daily still needs to find 85% or more of their magnesium somewhere else, from a diet that national surveys say is already falling short.
Why the industry underdoses it
Three honest reasons. Magnesium is expensive relative to sodium and sugar. Good forms are bulky: 220 mg of elemental magnesium as bisglycinate takes real space in a stick. And cheap forms like magnesium oxide absorb poorly and can upset stomachs, which teaches brands to keep doses low rather than switch forms.
The result is a category-wide gap between what the marketing implies and what the label delivers.
Forms are half the story
Elemental dose is not the only variable. Absorption varies widely by form:
- Bisglycinate: magnesium bound to glycine, well absorbed, gentle on digestion, commonly studied for relaxation and sleep quality.
- Malate: bound to malic acid, an intermediate in cellular energy production.
- Ionic (from mineral water sources): already dissolved and charged, available for rapid uptake.
- Citrate: decent absorption, mild laxative effect at higher doses.
- L-threonate: studied for crossing the blood-brain barrier; premium and bulky.
- Oxide: the cheap one. High elemental content on paper, poor absorption in practice.
A useful rule when reading labels: if a product does not name its magnesium form, assume the cheapest.
And dose and form still are not the whole picture. Magnesium works inside a system: vitamin B6 supports its transport into cells, and magnesium in turn activates vitamin D. A stick that carries magnesium without its cofactors leaves absorption on the table, which is why Tune Current is built as a complete nutritional foundation, multi-mineral, multi-vitamin, hydration, and super antioxidant support in one formula, rather than a magnesium delivery vehicle.
What a meaningful dose looks like
Nutrition researchers generally consider 100 mg the floor where supplemental magnesium starts moving intake meaningfully, and 200 mg or more the range where a daily product can plausibly close most of a typical dietary gap on its own. Two products in this audit reach that range.
Method note for anyone citing this
Doses were taken from each brand's published supplement facts for their flagship electrolyte product, standard flavor, at time of writing. Where labels vary by flavor, we used the most common figure. We make Tune Current, one of the audited products; every number here can be checked against the public labels in minutes, and we encourage exactly that. For the full category picture beyond magnesium, see our comparison of 8 electrolyte powders.
FAQ
Which electrolyte drink has the most magnesium?
In this audit, Tune Current (220 mg) and Magna (210 mg) lead. Most popular mixes contain 0 to 100 mg.
How much magnesium do adults need daily?
The RDA is 420 mg for adult men and 320 mg for adult women, per the NIH.
Does Gatorade or Liquid I.V. contain magnesium?
No. Neither flagship product lists any magnesium on its label.
Current is a dietary supplement. These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any disease.
