Magnesium glycinate: how much counts as enough
Magnesium glycinate per serving is listed as elemental magnesium on the Supplement Facts panel, and a common figure is 200 mg of the mineral carried by a larger weight of the compound. The front of the bottle counts the whole chelate. The panel counts what you are actually taking, and only one of those two numbers travels with you into a comparison.
Why the compound weight is bigger
Glycinate binds magnesium to the amino acid glycine. That binding is what makes the form gentle and soluble, and it also adds weight that has nothing to do with the mineral. A capsule holding 1000 mg of the compound might deliver 200 mg of magnesium, with the rest being the carrier doing its job.
The oxide form is the other end of the scale. It is dense in the mineral per gram and cheap, and it is the form people most often describe as hard on the stomach. Neither is wrong. They are different deals, and the panel is the only place the difference shows up as a number.
Reading a magnesium panel in 4 lines
Serving size first, then the nutrient line with its unit and percent daily value, then the capsules per bottle so you know how far one jar goes. At 2 capsules per serving, 120 capsules gives 60 days, and at $22 a jar that is about $0.37 a day.
I read those 4 fields and skip the rest, including the paragraph on the back about heritage and purity. The panel is written to be compared. The back of the pack is written to be believed.
A bigger number is not a stronger product
Two products can both say 1000 mg on the front and deliver very different amounts of magnesium, because the compound each one is built on is different. The nutrient row settles it in one glance, and the front of the box cannot help you at all.
I bought the wrong jar twice on this exact mistake. Both capsules were fine. The arithmetic was mine, and it took about 30 seconds to avoid each time.
I've kept the 4 fields for 18 products now, and I don't think I've saved a fortune. I've saved the 30 seconds of confusion each time, which is worth more than the difference in price.
If you're comparing 2 jars in an aisle, read both magnesium lines, then decide. It's the only step that matters.
Why the serving count decides running cost
If the label asks for 2 capsules a day and the jar holds 120, you have 60 days. If it asks for 3 and the jar holds 90, you have 30, at the same shelf price. Same row, 4 times the cost, and nothing about the packaging makes that obvious.
Write the 4 fields down before you buy. Read the line, run the count, and take your own number home rather than the biggest one in the aisle.
I've made that mistake often enough to keep the fields permanently now. It's 4 lines in a phone note, updated 3 or 4 times a year, and it has settled every one of these questions before I got to the till.
Two jars, two nutrient lines, one decision. The rest of the label is written for the shelf.
I check one more thing in an aisle, which is whether the serving is 1 capsule or 2. A jar of 120 means 120 days at one a day and 60 at two, and the price on the shelf never tells you which one you are buying.
Read the serving line first, the nutrient line second, and the price third. That order gets it right every time.
Frequently asked questions
How many milligrams should I look for?Show answerHide answer
Read the nutrient line, not the compound weight, and compare it with the daily value.
Does a bigger number mean a stronger product?Show answerHide answer
Not always. A larger compound weight can deliver less of the nutrient itself.
Where is this printed?Show answerHide answer
On the Supplement Facts panel, listed per serving.
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.
