Supplement Deal Methodology
How supplement deals are compared
Supplement Deals compares public retailer listings by product name, current listed price, package size, store, availability, and value signals such as cost per serving. A deal is only promoted when the listing has enough information to make a useful shopping comparison.
What affects ranking
- Current price: Lower listed prices can help, but only when the package and serving details are clear enough to compare.
- Serving and package size: Package-size data is normalized into cost per serving or related value metrics when the label data supports it.
- Store quality: Broken, banned, unverified, or irrelevant stores are excluded from public deal rankings.
- Freshness: Prices, subscription terms, coupons, and availability can change, so retailer pages remain the final source of truth.
Editorial guardrails
Supplement Deals is a shopping comparison site, not medical advice. Listings should not be treated as disease-treatment, diagnosis, or prevention claims. Shoppers should verify labels, warnings, testing details, subscription terms, and clinician guidance where appropriate.
