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Spring Valley, Minerals, analyzed by IngredientMD

Magnesium 400mg

1 ingredient documented, every dose read against the trials. The verdict set below is generated by the engine. Spring Valley can't edit it, and neither can we.

1 ingredient documentedRead line by lineLabel on file
Spring Valley Magnesium 400mg, front of pack
Front of pack, photograph on file
The verdict
Niche fit only.
For gap-fillers chasing deficiencies.
Also earned
100 tablets for under $4.400mg on the label looks impressive.Works well as an osmotic laxative.

The set is generated, never written by the brand.

The read

Spring Valley Magnesium 400mg: a narrow-fit formula. Lead: Magnesium at 400 mg. Magnesium oxide absorbs at approximately 4%, meaning 400mg delivers roughly 16mg of actual usable magnesium. Read the panel against the trials below; the analysis lays out where each dose lands.

400mg looks impressive until you learn magnesium oxide absorbs at about 4%. That's roughly 16mg of actual magnesium. A banana gives you 32mg. Magnesium oxide is primarily a laxative, not a mineral supplement. Pay $2 more for glycinate.

Spring Valley Magnesium 400mg, front of packWhat's in this, per 100 servings
✓ dose matches what trials used
MagnesiumMagnesium Oxide400 mg✓

1 of 1 shown, 1 dose at what the trials used

Magnesium 400mg supplement facts
What we analyzed

This read comes from the product's own supplement facts panel. Every dose was cross-referenced with published clinical trials to see whether it matches what the studies actually used.

1 ingredient read1 at trial doses
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Capsules arranged in a tray
Behind every ingredient on this label
Read the evidence itself.

Every active in Magnesium 400mg has its own page: doses, forms, interactions, cautions, and the studies behind them.

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