MegaFood Magtein Magnesium L-Threonate

Our verdict

MegaFood Magtein Magnesium L-Threonate works out to $1.33 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 $39.99 a month. We could not verify a third-party certification for MegaFood 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.