Read serving counts
This reads the label's arithmetic. A labelled serving is not a personal recommendation or safe dose.
Ingredients
Identify the exact ingredient and form before comparing two supplement labels.
In practice
Keep the ingredient name, unit, amount per serving and number of units in that serving on the same line. A similar product name does not establish the same formulation or evidence.
Use label arithmetic only to understand the package; it does not establish effectiveness or an appropriate dose.
Label maths
Compare label amounts
Compare the same ingredient form, unit and serving basis. Do not convert this result into a dose.