Guide
How to compare magnesium glycinate prices
Bottle price hides more than it shows, because serving size and elemental amount both vary by label. Price per 100 mg of elemental magnesium is the number that makes labels comparable.
Magnesium glycinate price is hard to compare bottle to bottle, because serving size and elemental magnesium content both vary from one label to the next. A cheaper bottle with fewer servings, or less magnesium per serving, can cost more per milligram of actual magnesium than a pricier one. Price per 100 mg of elemental magnesium is the unit that fixes this — here's how to calculate it for any label, worked through on our own.
Why bottle price and price per capsule both mislead
Bottle price ignores how many servings are inside and how much magnesium each one delivers. Price per capsule is a little better, but capsule count varies too: a "3 capsule" serving and a "1 capsule" serving aren't the same amount of anything until you know how much elemental magnesium is actually in each. Neither number accounts for the one variable that actually matters — the elemental magnesium you're buying.
The fair unit: price per 100 mg of elemental magnesium
Divide the bottle price by the total elemental magnesium the bottle contains — milligrams per serving multiplied by the number of servings — then scale to a 100 mg unit. That number is comparable across any two labels, regardless of serving size, capsule count, or how the front of the bottle is worded.
Our own numbers, worked through
Our lowest price is as low as $16.30 a bottle, on a 3-bottle subscription. Each bottle holds 30 servings of 275 mg of elemental magnesium. That's 30 × 275 mg = 8,250 mg of elemental magnesium per bottle, or 82.5 units of 100 mg. $16.30 ÷ 82.5 ≈ $0.20 per 100 mg of elemental magnesium. That figure only works because our label states the elemental amount directly — a label that gives only the compound weight, with no elemental figure, can't be priced this way without first working out the ratio, covered in our elemental magnesium guide.
| Step | Number |
|---|---|
| Elemental magnesium per serving | 275 mg |
| Servings per bottle | 30 |
| Total elemental magnesium per bottle | 8,250 mg |
| 100 mg units per bottle | 82.5 |
| Lowest price per bottle | as low as $16.30 (3-bottle subscription) |
| Price per 100 mg elemental magnesium | ≈$0.20 |
Running this on any label
- Find the elemental magnesium amount per serving on the Supplement Facts panel — not the compound weight.
- Multiply by the number of servings in the bottle to get total elemental magnesium.
- Divide the bottle's price by that total, then multiply by 100 to get price per 100 mg.
- Compare that single number across labels. Serving size, capsule count and bottle size stop mattering once you're comparing this way.
Our product page has a calculator that runs this automatically against the live price: see the price-per-100-mg tool on the magnesium glycinate product page.
Price per serving still isn't quite enough
Price per serving is closer to fair than bottle price, but it still hides a difference if two labels use different serving sizes or elemental amounts. A serving priced at $0.40 sounds cheaper than one priced at $0.60 — until you check that the first delivers 100 mg of elemental magnesium and the second delivers 300 mg. On a per-100-mg basis, the $0.60 serving is actually the better price. Serving price is a fine shortcut once you already know the two labels deliver a similar elemental amount; it stops being reliable the moment they don't, which is common across the category.
Subscription price vs one-time price
Where a price is quoted matters too. A brand's lowest price is usually a subscription price on its largest multi-bottle order, not the one-time price a first-time buyer sees on the product page. Our lowest figure — as low as $16.30 a bottle — is a 3-bottle subscription price; the one-time price is higher, and the product page shows every option rather than just the lowest one. When you're comparing a headline price between brands, check whether you're comparing the same kind of price on both sides, not a subscription figure against a one-time one.
Questions people ask
What's a fair price for magnesium glycinate?
There isn't a single number, because labels differ in elemental magnesium content and serving size. Price per 100 mg of elemental magnesium is the way to make an apples-to-apples comparison between any two products.
Why does magnesium glycinate cost more than magnesium oxide?
Partly because glycinate raw material generally costs more to manufacture than oxide, and partly because oxide delivers far more elemental magnesium per gram of compound (around 60% versus glycinate's roughly 14% ceiling), so a glycinate serving needs more raw material to hit the same elemental target. Price per 100 mg elemental magnesium is still the right way to compare the two, even though they're different compounds.
How much does a month of magnesium glycinate cost?
That depends on serving size and price, which both vary by brand. Our own bottle is 30 servings, priced as low as $16.30 on a 3-bottle subscription — about $0.54 a serving, or roughly $0.20 per 100 mg of elemental magnesium.
Does a bigger bottle always mean a better price?
Not necessarily. A larger bottle with a lower elemental amount per serving can still cost more per 100 mg of magnesium than a smaller one with a higher amount. Run the same calculation on both before assuming size is the deciding factor.
Sources
- Electric Tiger Magnesium Glycinate Supplement Facts and pricing: product page.
- Elemental magnesium explained.
- How to choose a good magnesium glycinate.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
