Dr. Mercola Magnesium L-Threonate, 2,000 mg, 90 Capsules (30 Servings)

Our verdict

Dr. Mercola Magnesium L-Threonate, 2,000 mg, 90 Capsules (30 Servings) works out to $1.17 per serving of magnesium l-threonate, at 2000mg per serving in capsule form. That puts it above the median of the 15 magnesium l-threonate products we can price per dose, where the typical serving costs $0.34, a Value Index of 0.3 where the median product is 1.0. One container lasts 30 days at the label dose of 1 serving a day, about $34.97 a month. We could not verify a third-party certification for Dr. Mercola in a public registry. Worked out from the current retail price as of 2026-11-13; confirm the live price on Amazon.com before buying.