Compare the evidence and the label—not just the front-of-bottle promise.
1. Define the claim
Ask exactly what the seller says the product supports. Disease-treatment claims require a very different level of scrutiny from general structure/function language.
2. Read the full formula
Record ingredients, forms, doses, serving size, and proprietary blends. Research is most relevant when it resembles the product's actual formulation and dose.
3. Separate ingredient evidence from formula evidence
A finished product needs its own evidence if you want to make finished-product conclusions.
4. Check safety and interactions
Medication interactions and health conditions can change the risk-benefit calculation.
5. Compare commercial terms
Use price per serving, total checkout cost, shipping, cancellation terms where applicable, and refund terms—not headline discounts alone.