Life Extension 99mg Potassium with Extend-Release Magnesium 250mg
- Potassium
- Capsule
- 100
- Unflavored
- More reviewed than 89%
A dual-action potassium and extend-release magnesium capsule, useful for people wanting both minerals from one bottle rather than higher-dose potassium alone.
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How it ranks among the 93 potassium we track
4.6★ across 6,600 Amazon ratings, Bayesian-smoothed toward the category average.
6,600 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
400+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 93 potassium we track - how the scorecard works · full potassium data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Life Extension's dual-mineral capsule pairs 99mg potassium with 250mg extend-release magnesium in one veg cap, gluten-free, non-GMO and vegetarian, 100 count.
Extend-release delivery aims to release the magnesium gradually rather than all at once, which can ease the GI upset some people get from standard magnesium capsules. The 99mg potassium dose matches the typical US over-the-counter ceiling for potassium supplements, not a prescription-strength dose.
- 99mg potassium plus 250mg magnesium
- 100 veg capsules per bottle
- Gluten-free, non-GMO, vegetarian
- Extend-release delivery technology
Who it's for
For people who want potassium and magnesium combined in a single capsule rather than two separate bottles. Not for anyone needing a higher therapeutic dose of potassium, which requires medical guidance.
Strengths and trade-offs
Drawn from this product's published specifications.
- Combines two minerals in one capsule
- Extend-release magnesium formulation
- Vegetarian and gluten-free
- Potassium capped at 99mg per capsule
- No additional flavor or dosing details
Performance notes
Extend-release magnesium technology is designed to release the mineral gradually rather than all at once, which may reduce the GI upset some people get from standard magnesium capsules. Potassium here is dosed at 99mg per capsule, the typical ceiling for over-the-counter potassium supplements in the US.
Specifications
| Brand | Life |
|---|---|
| Model | LEF-02309-100-B0427 |
| Form | Capsule |
| Count | 100 |
| Flavor | Unflavored |
Other Life potassium
How it compares
This product against the closest alternatives we track in potassium.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Life Extension 99mg Potassium with Extend-Release Magnesium 250mgThis product | 4.6 / 5 | 6,600 | 4.4 / 5 |
| NOW FOODS Potassium CitrateNow | 4.7 / 5 | 22,400 | 4.6 / 5 |
| Nature Made Potassium Gluconate 550 mgNATURE | 4.7 / 5 | 15,900 | 4.6 / 5 |
| Nutricost Potassium Citrate 99mgNutricost | 4.7 / 5 | 14,800 | 4.6 / 5 |
| NaturalSlim Natural Potassium Citrate Gluconate 99 mgNaturalSlim | 4.8 / 5 | 13,600 | 4.7 / 5 |
Similar potassium from other brands
Questions about the Life LEF-02309-100-B0427
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How much potassium is in each Life Extension capsule?
99mg per the product listing.
Is this formula vegetarian?
Yes, it's labeled vegetarian and gluten-free.
How many capsules come in a bottle?
100 veg capsules.