Why a compound outweighs the mineral inside it
1800mg of magnesium taurate and 1800mg of magnesium oxide do not deliver the same mineral, and the gap between them is close to sevenfold. A supplement is a mineral plus whatever it is attached to, and the attachment has weight. Oxide is magnesium and oxygen, and oxygen is light, so about 60% of the powder is magnesium. Taurate carries two taurine molecules, taurine is not light, and the elemental share falls to roughly 9%. Same element, same capsule weight, very different amount of the thing you came for.
If you want to see this on a real label, the Aged Garlic Extract Gummies with CoQ10 60mg - S-Allyl Cysteine Formula product page carries the full Supplement Facts panel.
Citrate lands near 16% and glycinate near 14%, which is why those two turn up so often when a formulator wants a decent elemental figure without a horse tablet. None of this is proprietary. The percentages follow from molecular weights, and anyone with a periodic table can reproduce them in about a minute. What the percentages don't tell you is tolerance, which is a separate argument entirely, and it is the reason oxide still sells despite absorbing poorly. A high elemental share is worth less than it looks if the form upsets your stomach and you stop taking it.
What the panel has to tell you
The Supplement Facts panel lists the mineral rather than the compound, and it puts a % Daily Value beside it. The Daily Value for magnesium is 420 mg for adults, so a panel reading 45% is telling you about 190 mg of elemental magnesium no matter what the front of the bottle shouts. That percentage is the fastest cross check available to you, and it's the one figure a marketer can't round in their own favour. If a panel shows no percentage at all, you're looking at a proprietary blend, and you have lost the ability to compare much of anything.
You can run the arithmetic yourself. Multiply the %DV by the Daily Value and you have the elemental amount in milligrams, compound weight or not. Zinc uses 11 mg, calcium uses 1300 mg, and magnesium uses 420 mg, so the same trick works across the whole shelf.
The same trick shows up in botanicals
Aged garlic extract behaves the same way. A label can quote the weight of the extract, or it can quote S-allyl cysteine, the water soluble compound that forms during aging and the marker researchers use to standardise the material. Two numbers, one capsule, and neither is wrong. Our aged garlic gummies state 60mg of CoQ10 as ubiquinol per serving, which is also a compound weight, and it should be stated that way because that is literally what goes into the gummy. The 90 count bottle at two gummies a day is 45 days of supply, and for a botanical the compound figure is the honest unit.
Why the front of the bottle picks the bigger number
Compound weights are larger, and larger numbers look like stronger products. That is the entire marketing logic, and it isn't illegal, because both figures are true. A brand quoting 1800mg is telling you how much magnesium taurate it put in. A brand quoting 160 mg is answering the question you actually asked. You're allowed to prefer the one that answers it.
How to compare two bottles in a minute
Find the elemental line first, then divide the price by days of supply rather than by capsule count. A 90 count bottle at two gummies a day is 45 days, and a 120 count bottle at two capsules a day is 60 days, so the cheaper bottle is frequently not the cheaper bottle. Serving size is where the second trick lives, because one capsule a day and two capsules a day change every per day figure by a factor of two. If a product quotes only the compound weight and never the mineral, treat the omission as an answer.
Where the elemental number then matters
Magnesium carries a supplemental upper level of 350 mg a day for adults, and that ceiling refers to the element, not to anything it is bound to. This is the practical reason the distinction matters. A shopper comparing compound weights can walk away with several times the mineral they intended, or a fraction of it, and both outcomes come from reading the wrong line. Check the panel, check the percentage, and the rest of the label stops being a guessing game.
Frequently asked questions
How do I find the elemental amount?Show answerHide answer
It is on the Supplement Facts panel, usually listed under the compound name.
Why do labels quote the compound?Show answerHide answer
Because that is what goes in the capsule. Both figures are legitimate, so read the one you are comparing.
Does % Daily Value refer to the elemental amount?Show answerHide answer
Yes, which is why it is a useful cross check.
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.
