Magnesium malate cost per serving, worked from the label
One bottle of 60 magnesium malate tablets at $11.40 works out at $0.19 a dose, and each dose carries 60 mg of mineral from 425 mg of compound. Those two numbers sit on every label and get read as the same thing. They aren't. Compound weight is what you swallow. The mineral weight is what your body can use, and for malate that's near 14 percent by mass.
Divide the mineral figure by the compound figure before you compare two bottles. Oxide runs near 60 percent, and malate runs near 14.
Why the elemental percentage decides the price
Magnesium oxide packs 300 mg of mineral into a 500 mg tablet, which is why it sells for $0.10. Malate can't do that, because the malic acid attached to each atom adds real weight that your body doesn't count as mineral. A 425 mg malate dose yielding 60 mg is a normal ratio, not a weak formula, and any brand quoting 200 mg from 425 mg of malate is quoting arithmetic that doesn't exist. We use the 14 percent figure because it's the honest one.
You'd need 5 malate doses to match the mineral load in 1 oxide dose. That's the trade, and it's why malate costs more per day.
What a certificate of analysis actually covers
A certificate of analysis answers 4 separate questions, and a single panel rarely covers all of them. Identity confirms the powder is magnesium malate and not magnesium citrate in the wrong drum. Potency measures the mineral content per gram. Heavy metals screen for lead, cadmium, arsenic and mercury at parts per million. Microbes screen for total plate count, yeast and mould. Ask a brand which of the 4 were run on which batch, by which lab. The honest limit is that testing is voluntary in most of this market, so a brand with no certificate isn't necessarily lying. It just hasn't shown you anything.
Batch numbers matter more than brand names. A certificate for batch A tells you nothing about the bottle in your hand from batch F.
| Check | What it answers | Unit |
|---|---|---|
| Identity | Right raw material | pass or fail |
| Potency | Elemental magnesium per gram | mg per g |
| Heavy metals | Lead, cadmium, arsenic, mercury | ppm |
| Microbes | Plate count, yeast, mould | cfu per g |
Reading the numbers on our own bottle
Malate costs more per elemental milligram and less per capsule, which is the odd part of shopping this form. A bottle of 60 at $11.40 runs $0.19 a dose, while an oxide bottle of 120 at $12.00 runs $0.10 and carries 5 times the mineral load. Neither figure is wrong. They answer different questions, and the one that matters is what your daily routine asks for.
Splitting a dose across a day
Malate's 60 mg per dose makes it easy to take 2 doses 8 hours apart and land at 120 mg across the day, which some people prefer over a single 300 mg oxide hit at breakfast. If you're one of them, a bottle lasts 30 days, which puts the real cost at $0.38 per day rather than $0.19. Read the directions box before you compare per-serving figures, because ours prints 1 capsule per serving and the next brand might print 2.
We run all 4 assays on every production lot of malate and print the code on the base of the bottle. Our 60-tablet version is $11.40, and a 2-bottle order at $22.80 clears the $35 free shipping threshold only with a third item added, so check that before you order a pair expecting free delivery. The $35 line is where the arithmetic shifts, and $0.19 per day becomes $0.21 once a single order's postage is spread across 60 doses instead of 180.
Read the directions box twice when the front panel shows a tablet tally instead of a dose, because those two figures differ on plenty of labels in this market.
If you want the lowest cost per milligram of mineral, oxide wins and malate loses by roughly double. If you want a smaller dose per capsule so you can split it across a day, or you find oxide rough on your stomach, malate lets you do that, and $0.19 per day is what the flexibility costs. Neither is a mistake.
Frequently asked questions
What does a certificate of analysis cover?Show answerHide answer
Whatever assays were ordered. Ask which were run before assuming anything.
Is testing legally required?Show answerHide answer
Verification is voluntary in most of the market, which is why brands differ so much.
What should I ask a brand?Show answerHide answer
Which batch was tested, by which lab, and for which four things.
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.
