Guides & Comparisons / Magnesium guides
How to Choose Magnesium: Form, Amount and Value
A practical guide to comparing the elemental-magnesium declaration, form, and package value.By Suppscan Editorial Team · Last checked September 22, 2026A practical guide to comparing the elemental-magnesium declaration, form, and package value.
Find the elemental-magnesium line
Magnesium products often name a compound such as glycinate or citrate. For like-for-like comparison, use the label’s declared elemental magnesium amount per serving, then record the serving count and package price. The compound name describes the form; it does not by itself state the elemental-magnesium amount.
| Label item | Use in comparison |
|---|---|
| Elemental magnesium, mg | Use as the active amount per serving. |
| Magnesium form | Record separately as product information. |
| Servings per container | Use to calculate total declared elemental magnesium. |
What this guide compares
Read the product label before comparing a headline claim. This guide focuses on elemental magnesium milligrams per serving, servings per container, the named form, and price per gram of elemental magnesium. Use the stated numbers and leave any undisclosed value unknown.
How to compare the same unit
For a worked example only, a $20 package with 60 servings of 200 mg declared elemental magnesium contains 12 g of elemental magnesium. Its cost is about $1.67 per gram of elemental magnesium. This is a comparison calculation, not nutrition advice.
Keep price and formulation separate
A package price is a useful starting point, but it does not describe the full formula. Compare the ingredient information and package size first, then use one common calculation to make the cost easier to understand.
Use current SuppScan data
SuppScan presents the product data available in its catalog and does not manufacture missing values. Open the Magnesium comparison to review current offers and normalized metrics.
Frequently asked questions
What should I compare first?
Start with the declared active amount and serving information. A front-label phrase cannot replace the values in the product facts panel.
Does this page rank products?
No. It explains a comparison method and links to current catalog data rather than claiming a permanent winner.
Sources and review
Method: declared manufacturer label data and current merchant listings where available. Worked prices are explicitly illustrative calculations, never live quotes. Last reviewed September 22, 2026. Read how Suppscan compares products.
Current products tracked by SuppScan
Live catalog snapshot: package prices and disclosed metrics currently available for this category. Missing metrics stay blank.
| Product | Merchant | Price | Normalized metrics |
|---|---|---|---|
| Now Foods, Magnesium Oxide Powder, 8 OZNow Foods | Universal Herbs Inc | €9.30 | Price per 1,000 mg elemental magnesium: €0.07Elemental magnesium mg per label serving: 400Label servings per package: 324 |
| Now Foods, Magnesium Ascorbate Powder, 8 OZNow Foods | Universal Herbs Inc | €14.78 | Price per 1,000 mg elemental magnesium: €0.08Elemental magnesium mg per label serving: 820Label servings per package: 227 |
| Now Foods Magnesium Oxide Pure Powder · 0.227 kgNow Foods Magnesium Oxide Pure Powder | iHerb | €14.53 | Price per 1,000 mg elemental magnesium: €0.11Elemental magnesium mg per label serving: 290Label servings per package: 454 |
| Best Naturals Magnesium Oxide 500 Mg 180 Tablets · 0.206 kgBest Naturals Magnesium Oxide 500 Mg 180 Tablets | iHerb | €14.61 | Price per 1,000 mg elemental magnesium: €0.16Elemental magnesium mg per label serving: 500Label servings per package: 180 |
| Nutricost Magnesium Oxide 750 Mg 240 CapsulesNutricost Magnesium Oxide 750 Mg 240 Capsules | iHerb | €17.44 | Price per 1,000 mg elemental magnesium: €0.17Elemental magnesium mg per label serving: 420Label servings per package: 240 |