Label check
Metagenics Magnesium Glycinate vs. Electric Tiger: Label Check
Metagenics is a tablet, one a day, 120 to a bottle. Its label doesn't print the glycinate weight, so the ratio check that works on our label can't run on theirs.
We make Electric Tiger Magnesium Glycinate, which competes with the product compared here. Every figure about Metagenics Magnesium Glycinate is read from its own site, checked on 26 September 2026, and linked below. If something has changed, tell us and we will update it. Metagenics is a trademark of its owner; Electric Tiger is not affiliated with Metagenics.
The short answer: Metagenics is a tablet, one a day, 120 to a bottle, listing 100 mg of magnesium per tablet (24% DV) as magnesium bis-glycinate — the same chelate most labels call magnesium glycinate. Its label doesn't print the compound weight, so the magnesium-to-glycinate ratio can't be checked from it. Ours lists 275 mg of magnesium from 2,500 mg of magnesium glycinate, an 11% ratio, under the 14% chemical ceiling. Metagenics' 120-tablet bottle is $34.95 on its site ($27.96 on a 2-3 month subscription plan); ours is as low as $16.31 a bottle on subscription.
The two labels, side by side
| Metagenics Magnesium Glycinate | Electric Tiger Magnesium Glycinate | |
|---|---|---|
| Form | Tablet | Capsule |
| Serving size | 1 tablet | 3 capsules |
| Servings per bottle | 120 | 30 |
| Magnesium per serving | 100 mg | 275 mg |
| % Daily Value | 24% | 65% |
| Compound named on label | Magnesium bis-glycinate | Magnesium Glycinate |
| Compound weight per serving | Not stated on the label | 2,500 mg |
| Magnesium ÷ compound weight | Can't be checked — compound weight not printed | 11% |
| Other ingredients | Microcrystalline cellulose, croscarmellose sodium, stearic acid (vegetable), silicon dioxide | Hypromellose (capsule), magnesium stearate, silicon dioxide, rice flour |
| Certifications printed | None printed on the label facts read | None held |
| Price (120-tablet bottle) | $34.95 on its site ($27.96 on a 2-3 month subscription plan) | As low as $16.31 a bottle on subscription |
| Price per 100 mg magnesium | about $0.23 (subscription) | about $0.20 |
Why the ratio can't be checked on this label
Magnesium bis-glycinate — the compound name Metagenics prints — is chemically the same chelate as the magnesium glycinate named on our label: one magnesium atom bound to two molecules of the amino acid glycine, formula C4H8MgN2O4, molecular weight 172.42, of which the magnesium atom weighs 24.3. So magnesium is at most about 14.1% of that compound by weight. Metagenics' label states the magnesium (100 mg) but not the compound weight it came from, so that division isn't possible from what's printed. Ours states both: 275 mg of magnesium from 2,500 mg of magnesium glycinate, an 11% ratio, under the ceiling.
Where each label does better
Metagenics' bottle holds 120 servings against our 30, so one bottle lasts four times as long at its labeled serving size, and it's a single tablet a day rather than three capsules. Its label also specifies that its stearic acid is vegetable-sourced; ours lists magnesium stearate without stating a source. Metagenics doesn't print a third-party certification on the label facts read for this comparison, and neither do we.
How to check any magnesium label
- Find the row that names magnesium on its own. That amount is the magnesium.
- Find the compound in brackets and its weight, if the label gives one.
- Divide the first by the second. For magnesium glycinate or bis-glycinate, expect about 14% or a little less. If the label doesn't print the compound weight, this step stops here.
- Compare prices on magnesium, not bottles: our magnesium page has a calculator for price per 100 mg.
Sources
- Metagenics Magnesium Glycinate label and pricing: metagenics.com. Checked 26 September 2026.
- Magnesium bis-glycinate chelate, C4H8MgN2O4, 172.42 g/mol: PubChem CID 84645.
- Electric Tiger Magnesium Glycinate Supplement Facts: product page.
- Costello, R. et al. "Interpreting the Evidence to Guide Magnesium Supplement Dosing." Nutrients, 2023. PMID 37487817.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Sources
- Perspective: Call for Re-evaluation of the Tolerable Upper Intake Level for Magnesium Supplementation in Adults In 7 of 10 trials between 128 and 1,200 mg a day, magnesium caused no more diarrhea than the comparison.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
