Method 1.0.0
An explainable priority, not a magic number.
TIER ranks ingredients within a goal. It never gives an ingredient or product a universal score.
Unit of evaluation
Ingredient × goal × user context. Evidence belongs to each ingredient–goal pair. Personalization adjusts practical fit without rewriting that evidence.
Priority factors
What the priority tier means
Priority combines evidence, expected benefit, tolerability, practicality, time and cost. It is not an efficacy percentage. Evidence certainty is shown separately.
Priority tier and evidence certainty
Priority tier answers “what deserves consideration first for this goal?” Evidence certainty answers “how well supported is this assessment?” They are shown separately.
Usually deserves early consideration for that goal across the full set of factors.
Strong overall fit with visible tradeoffs.
May fit specific contexts or a supporting role.
May have emerging evidence, smaller benefit, or important tradeoffs. It does not mean harmful.
Stable ordering
With the same data and method version, ordering remains stable. When sources or the method change, TIER updates the date and explains material corrections.
Current scientific limitation
Editorial preview. This release does not yet publish complete scientific source lists or clinical review. It does not show references, credentials, or review claims that do not exist.
Commercial independence
Commission, sponsorship, availability, and price cannot change rank, priority tier, or evidence certainty. Any commercial relationship appears beside the outbound link.
Corrections
Material corrections update the assessment, its date, and the method version when calculation behavior changes. Read the corrections policy.