What do the states mean?+
- Solid: well studied, and it works.
- Half-there: the science is still forming.
- A ghost: almost no real studies.
- Hollow: well studied, and it does not work.
- A cord: the pair itself has been tested together.
- Air: nobody has ever tested this pair.
The full scoring method: How we score
Can you take magnesium and potassium together?
Tested together, early signs.
As of August 2026, magnesium and potassium have been tested together in 1 trial, in adults with diabetes and insomnia, and the one trial so far came out ahead of placebo. Scored under the same rules as everything here.
29 studies · 1 tested the actual pair
What you’re seeing
- Magnesium renders half-there: for sleep, the science is still forming.
- Potassium renders half-there: for blood pressure, the science is still forming.
- The woven cord is the rare part: one trial gave both together, and the one trial so far came out ahead of placebo.
You can tell before you read a word.
Magnesium + L-theanine are sold together in the same aisle. No trial has ever tested the pair. When that is true, we draw nothing between them. The nothing is the review.
The pair trial
- 2024Randomized trial · 320 people · adults with diabetes and insomnia · the pair helpedsource
The other 28 studies on file tested each one alone. See all 29 studies
Fair questions
Is it safe to take magnesium and potassium together?+
The studies on this page gave both together and reported no harm from the combination. That is not the same as a safety trial, and it says nothing about your dose or your medication.
How many studies is this based on?+
1 that gave the pair together. The papers are listed above with links to the source.
Deeper
What each one is on its own+
Magnesium
- Sleephalf-there
- Blood pressuresolid
- Blood sugarsolid
- Cholesterolhalf-there
- Hearthalf-there
- Moodhalf-there
- Stress and anxietyhalf-there
- Weight and body fathalf-there
Potassium
- Blood pressurehalf-there
- Hearthalf-there
Pairs that have been tested+
- Magnesium has been tested with melatonin, L-carnitine, vitamin D, probiotics, calcium, vitamin E.
These are the combinations someone has actually run a study on. Every other pairing here is air.