By the Arialief information desk. .
Many supplements list a "proprietary blend": one total weight for several ingredients, with no individual amounts. Here is how to read one.
What the rules allow
U.S. labeling rules let a company list a blend's total weight and its ingredients in descending order by weight, without saying how much of each is included.
Order tells you something
The first ingredient listed is the largest. In Arialief's blend, magnesium glycinate comes first.
Use any number that is printed
If one ingredient has its own line, you can estimate. Arialief prints 80 mg of magnesium from magnesium glycinate. Because magnesium glycinate is only about 14 to 20% magnesium by weight, most of the 575 mg blend is probably magnesium glycinate.
Compare with research doses
Look up the amounts used in studies. If a blend's total weight is smaller than the study dose of a single ingredient, the doses are probably lower than in research.
Ask the seller
A seller can tell you the amounts even if the label does not. A clear answer is a good sign.
See how this works in practice on our Arialief ingredients page.
General information only, not medical advice. See a doctor about any new nerve symptoms.