Label check
Nature Made Magnesium Glycinate vs. Electric Tiger: Label Check
Nature Made's label names the compound Magnesium Bisglycinate and carries a third-party certification mark, but doesn't print the compound 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 Nature Made High Absorption Magnesium Glycinate 200 mg 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. Nature Made is a trademark of its owner; Electric Tiger is not affiliated with Nature Made.
The short answer: Nature Made's label lists 200 mg of magnesium per serving (48% DV) naming the compound Magnesium Bisglycinate — the same chelate most labels call magnesium glycinate — but it doesn't print the compound weight, so the magnesium-to-glycinate ratio can't be checked from this label. Ours lists 275 mg of magnesium from 2,500 mg of magnesium glycinate, an 11% ratio, under the 14% chemical ceiling. Nature Made's 30-serving bottle is $21.99 on its site ($19.79 on subscription); ours is as low as $16.31 a bottle on subscription.
The two labels, side by side
| Nature Made Magnesium | Electric Tiger Magnesium Glycinate | |
|---|---|---|
| Serving size | 2 capsules | 3 capsules |
| Servings per bottle | 30 | 30 |
| Magnesium per serving | 200 mg | 275 mg |
| % Daily Value | 48% | 65% |
| Compound named on label | Magnesium Bisglycinate | 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 | Hypromellose, magnesium stearate, cellulose gel, silicon dioxide | Hypromellose (capsule), magnesium stearate, silicon dioxide, rice flour |
| Certifications printed | USP Verified | None |
| Price (30-serving bottle) | $21.99 on its site ($19.79 on subscription) | As low as $16.31 a bottle on subscription |
| Price per 100 mg magnesium | about $0.33 (subscription) | about $0.20 |
Why the ratio can't be checked on this label
Magnesium bisglycinate — the compound name Nature Made 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. Nature Made's label states the magnesium (200 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
Nature Made carries the USP Verified mark, which tests for what a label claims and checks for contaminants; ours carries no third-party certification. Its label also states a % Daily Value.
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 bisglycinate, 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
- Nature Made High Absorption Magnesium Glycinate 200 mg label and pricing: naturemade.com. Checked 26 September 2026.
- Magnesium bisglycinate 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.
