1
Editorial ranking
Best Magnesium Supplements 2026: independent ranking by dose, price, testing and evidence
We track 14 Magnesium products from 9 brands. Every product is scored on the same five-pillar composite: dose honesty, evidence, price per month, third-party testing, and formula transparency. No brand pays for placement. The ranking updates automatically when product data changes.
Independent rankingNo paid placementAuto-updated
Top 10 Magnesium supplements
2
Runner-up
Magnesium Bisglycinate
Thorne HealthTech
67%
Matches studies
$1.30
per day
Score: 7.6/10
Tested
3
4
5
Magtein Magnesium L-Threonate Capsules
Nootropics Depot
Score: 7.3/10
667%
Matches studies
$0.20
per day
TestedCoA
6
7
Two-Per-Day Multivitamin (capsules/tablets)
Life Extension
Score: 7.1/10
94%
Matches studies
$0.43
per day
Tested
8
Magnesium Glycinate Powder
BulkSupplements
Score: 6.8/10
733%
Matches studies
$0.06
per day
9
10
AGZ: Nightly Sleep Support
AG1 (Athletic Greens)
Score: 6.5/10
83%
Matches studies
$3.96
per day
Tested
Detailed comparison
| Rank | Product | Brand | Dose | Price/mo | Tested | Score |
|---|---|---|---|---|---|---|
| 1 | Pure Vitamin D3, K2 & Magnesium | DoNotAge | 250.0 mg | $24.00 | No | 7.9 |
| 2 | Magnesium Bisglycinate | Thorne HealthTech | 200.0 mg | $52.00 | Yes | 7.6 |
| 3 | SureSleep | DoNotAge | 260 mg | $45.00 | Yes | 7.5 |
| 4 | Basic Nutrients 2/Day | Thorne HealthTech | 20.0 mg | $32.00 | Yes | 7.4 |
| 5 | Magtein Magnesium L-Threonate Capsules | Nootropics Depot | 2001.0 mg | $39.99 | Yes | 7.3 |
| 6 | Nitralis® | DoNotAge | 800.0 mg | $98.00 | Yes | 7.1 |
| 7 | Two-Per-Day Multivitamin (capsules/tablets) | Life Extension | 100.0 mg | $24.50 | Yes | 7.1 |
| 8 | Magnesium Glycinate Powder | BulkSupplements | 2200.0 mg | $19.97 | No | 6.8 |
| 9 | Neuro-Mag Magnesium L-Threonate | Life Extension | 144.0 mg | $30.00 | Yes | 6.7 |
| 10 | AGZ: Nightly Sleep Support | AG1 (Athletic Greens) | 250 mg | $99.00 | Yes | 6.5 |
Scores are editorial judgments, not a scientific standard. See our scoring methodology for how the composite is calculated. Prices are USD and may vary.
What is Magnesium?
Magnesium is an essential mineral involved in over 300 enzymatic reactions, including ATP metabolism, DNA repair, and muscle function. An estimated 50% of adults in developed countries do not meet the recommended daily intake. Different forms have different bioavailability: glycinate for sleep and anxiety, citrate for absorption, malate for energy, threonate for cognitive effects. Human trials show magnesium supplementation can reduce blood pressure, improve sleep quality, and reduce muscle cramps.
Evidence grade: A. One of the most common deficiencies; corrects sleep, muscle cramps, and blood pressure. Read the full evidence review: Magnesium ingredient page.
How we rank Magnesium supplements
Every Magnesium product in our database is scored on five pillars:
- Dose honesty: Does the product contain the amount stated on the label? We check against published third-party assay results when available.
- Evidence: Magnesium has evidence grade A. Products that cite relevant trials score higher.
- Price per month: Total monthly cost based on label serving recommendations.
- Third-party testing: Does the brand publish a Certificate of Analysis (CoA) from an independent lab?
- Transparency: Is the full formula public? Are all ingredient amounts disclosed?
See the full methodology for the scoring formula.
What to look for in a Magnesium supplement
- Dose: 200 to 400 mg elemental magnesium per day. The RDA is 400 mg for men, 310 mg for women.
- Form: Glycinate for sleep, citrate for general use, threonate for cognition, malate for energy. Avoid magnesium oxide (only 4% bioavailable).
- Purity: Look for products that state elemental magnesium content, not just compound weight.
- Price: Magnesium is inexpensive. Prices range from $8 to $25 per month.
- Testing: Third-party testing for heavy metals is important for mineral supplements.
See the full Magnesium evidence page for dosing, safety, and landmark studies.
Frequently asked questions
How often is this ranking updated?
Our database checks product prices, availability, and testing status continuously. The ranking recalculates whenever product data changes. The "last updated" date on each product page reflects the most recent verified change.
Do brands pay for placement on this list?
No. We do not accept payment for ranking position. Brands can purchase clearly labeled ad slots, but these never appear in or influence editorial rankings. See our advertising policy.
What dose of Magnesium should I take?
Dosing depends on the ingredient. See the Magnesium ingredient page for the trial dose, range, and safety data.
Is Magnesium safe?
Magnesium has evidence grade A. Read the safety section on the ingredient page for known interactions and contraindications.