Label check
Sports Research Magnesium Glycinate vs. Electric Tiger: Label Check
Sports Research carries more third-party certifications than we do and a lower one-time bottle price; 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 Sports Research Magnesium Glycinate Veggie Capsule 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. Sports Research is a trademark of its owner; Electric Tiger is not affiliated with Sports Research.
The short answer: Sports Research's label lists 160 mg of magnesium per serving (38% DV) from chelated magnesium glycinate (Chelamax®), but it doesn't print the glycinate 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. Sports Research's 90-capsule bottle is $17.95 on its site ($15.26 on subscription); ours is as low as $16.31 a bottle on subscription.
The two labels, side by side
| Sports Research Magnesium Glycinate | Electric Tiger Magnesium Glycinate | |
|---|---|---|
| Serving size | 2 capsules | 3 capsules |
| Servings per bottle | 45 | 30 |
| Magnesium per serving | 160 mg | 275 mg |
| % Daily Value | 38% | 65% |
| Compound named on label | Chelated magnesium glycinate (Chelamax®) | Magnesium Glycinate |
| Compound weight per serving | Not printed on the label | 2,500 mg |
| Magnesium ÷ compound weight | Can't be checked — compound weight not printed | 11% |
| Other ingredients | Veggie capsule (hypromellose), rice hulls | Hypromellose (capsule), magnesium stearate, silicon dioxide, rice flour |
| Certifications printed | NSF Certified Gluten-Free, Non-GMO Project Verified, Certified Vegan, Third Party Tested | None |
| Price (90-capsule bottle) | $17.95 on its site ($15.26 on subscription) | As low as $16.31 a bottle on subscription |
| Price per 100 mg magnesium | about $0.21 (subscription) | about $0.20 |
Why the ratio can't be checked on this label
Chelated magnesium glycinate — the form Sports Research names, supplied under the brand name Chelamax — is 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. Sports Research's label states the magnesium (160 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
Sports Research carries more certifications on its label than ours: NSF Certified Gluten-Free, Non-GMO Project Verified, Certified Vegan, and a third-party-tested claim; ours carries no third-party certification. Its bottle is also priced lower in absolute dollars on subscription ($15.26 versus our $16.31), though its serving carries less magnesium (160 mg versus our 275 mg), which is why the per-100-mg figure above — not the bottle price — is the number to compare.
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, 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
- Sports Research Magnesium Glycinate Veggie Capsule label and pricing: sportsresearch.com. Checked 26 September 2026.
- Magnesium 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.
