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Qunol Minerals Extra Strength Magnesium 420 mg is a capsule sold under the Qunol Minerals brand. Its label lists 1 vitamin or mineral. At the label's highest daily amount (2 capsules a day), magnesium (120% of the adult limit) is above the upper limit for adults, from this product alone. Upper limits don't apply when a doctor prescribes a higher amount for a set time; if nobody did, talk to your doctor or pharmacist before you change anything.
Take other supplements too? Add this one to the Supplement Checker and see your daily totals next to the limits for your age.
Add Qunol Minerals Extra Strength Magnesium 420 mg to the Supplement Checker
What’s in Qunol Minerals Extra Strength Magnesium 420 mg
| Ingredient | Per serving | Per day | Share of the adult limit |
|---|---|---|---|
| Magnesium | 420 mg | 420 mg | 120% (above the adult limit) |
“Share of the adult limit” compares the daily amount with the upper limit for adults 19 to 50 (From age 51 the calcium limit is 2,000 mg; from age 71 the phosphorus limit is 3,000 mg). For most nutrients the limit counts food too.
How to take Qunol Minerals Extra Strength Magnesium 420 mg (from the label)
- The label says: “Directions: Adults take two (2) capsules daily with food, or as recommended by your healthcare professional.”
Qunol Minerals Extra Strength Magnesium 420 mg warnings (from the label)
- “Keep out of reach of children”
- “If you are pregnant or nursing, seek the advise of a health professional before using this product.”
- “Tamper resistant: Do not use if safety seal over cap is broken or missing. To report a serious adverse event or to obtain product information contact 1-877-290-2621.”
Other ingredients
Hydroxypropyl Methylcellulose, Silicon Dioxide, Magnesium Stearate.
FDA recalls for Qunol Minerals
The FDA enforcement records list no supplement recall under the name Qunol Minerals (searched November 9, 2026). That doesn’t mean a product is safe; see our supplement recall tracker for recent recalls.
Who sells it
Quten Research Institute, LLC, Pine Brook, NJ (as printed on the label).
If you think you or a child took too much of a supplement, call Poison Control at 1-800-222-1222 (U.S., free, 24 hours) or use poison.org. In an emergency, call 911.
Sources: NIH Dietary Supplement Label Database, label 328870; upper limits from the National Academies Dietary Reference Intakes. Labels change: check the amounts on your bottle.
General information, not medical advice. Your doctor may recommend a different amount, for example to treat a deficiency. Talk to your doctor or pharmacist before you start, stop or change a supplement, especially if you are pregnant, nursing, take medication or have a medical condition.