Independent supplement ratingsUS and Canada · Updated weekly
A ratings desk for a category that has spent thirty years grading its own homework.
A ratings desk for a category that has spent thirty years grading its own homework.
7-form blend · 50 capsules
Total 500mg / per-form dose undisclosed
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The most heavily marketed magnesium on the internet — and it's better than the ads deserve, but you pay for the ads. Magnesium Breakthrough puts seven forms of magnesium in one capsule, which sounds impressive and has a grain of truth. The problem is the label doesn't split the dose across those seven forms, so you can't tell how much of each you're actually getting. At roughly $1.36 a serving it's the priciest here by a wide margin.
The tub lists a 500 mg total across the blend but not the per-form breakdown — so the single most useful number, how much of each type you get, is missing. That's not a scam; it's just less transparent than a single-form product where the elemental dose is right on the label. A chunk of the price is the seven-forms story.
Fine if you specifically like the multi-form idea and don't mind paying a premium for it. If you mainly want a proven dose of a well-absorbed form, a single-form glycinate does the same job for a fraction of the price.
Reviewed and fact-checked by the NFS editorial team · Last updated 12 Jul 2026