How do I compare supplement labels?

Short answer

Supplement labels can look similar while hiding important differences. First compare the active ingredient amount per serving, the form, serving size, other active ingredients, allergens, testing signals, and warning text. Price is useful only after you know what each serving actually provides.

Compare first

• Active amount per serving
• Ingredient form and serving size
• Testing, allergens, and warning text

Watch out

• Front-label claims can be less useful than the Supplement Facts panel.
• Avoid stacking products with overlapping ingredients unless the total intake is clear.

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