How to compare
How to Compare Magnesium Supplements
A simple checklist for buying magnesium without overpaying.
Short answer
Compare on form, elemental dose, clean-label flags and cost-per-dose — in that order. Brand and packaging should come last.
Key comparison points
- 01Step 1 — Match the form
- 02Step 2 — Match the elemental dose
- 03Step 3 — Check clean-label flags
- 04Step 4 — Calculate cost-per-dose
- 05Step 5 — Decide what you're paying extra for
- 06What to ignore
Quick checklist
| Check | Why it matters |
|---|---|
| Magnesium form | Different forms aren't directly comparable |
| Elemental mg | The number that actually matters |
| Cost per dose | Removes bottle-size confusion |
| Clean-label flags | Avoids paying premium for premium claims that aren't there |
What Fair Shelf compares
- Like-for-like form matches
- Elemental dose parity
- Cost per comparable dose
- Clean-label transparency
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Related magnesium guides
Value pickBest Value Magnesium Glycinate in the UKForm explainerMagnesium Glycinate vs BisglycinatePricingWhy is Magnesium So Expensive?Informational only — not medical advice. Fair Shelf does not tell you to start, stop or switch supplements. Always check the label and speak to a qualified professional if unsure.