Read the total literally
A 10 mg blend label states a combined reference amount. Without a component breakdown, it does not tell you the amount of either ingredient. A two-name label should never be read as 10 mg of each name.
Use a simple arithmetic check
If a specification explicitly lists 5 mg of component A and 5 mg of component B, the stated total is 10 mg. A different 10 mg blend could have another ratio. Equal totals alone therefore do not establish matching formulations. This is an inventory example, not a preparation instruction.
Distinguish a stack
Two separate 5 mg vials remain two records, even if their combined mass also equals 10 mg. Packaging, documentation and handling information belong to the individual components.
Compare the right evidence
Research on a single ingredient does not automatically describe a mixture. A useful comparison identifies the exact combination and ratio, the experimental setting and the measured outcome. Keep unknown component amounts visibly unknown until they are documented.