Data Methodology and Corrections

Collection and freshness

Discovery and current product data use Amazon's Creators API. Price feeds are scheduled twice daily. Always confirm final price and availability on Amazon.

Dose evidence

High confidence requires an explicit per-serving, per-scoop, or per-dose creatine statement. Medium confidence permits a plausible creatine-adjacent title amount only when the listing also supplies a serving count. Container weights and per-gummy claims are not treated as serving doses.

Formula

price ÷ (servings × creatine grams per serving) gives cost per gram. The price index multiplies that result by five.

Corrections

Email info@creatineprices.com with the product URL or ASIN, disputed field, and manufacturer label/source. Evidence is reviewed before a correction is accepted.

Editorial and commercial policy

Rankings follow displayed cost data and are not changed for commission rate. Affiliate links are marked as sponsored. The comparison measures price efficiency, not health outcomes or product quality.

Update log

• August 2026: replaced assumed doses with high/medium/unverified evidence states.
• August 2026: added pre-publication quality gates, dedicated attribution, current benchmarks, and indexability thresholds.