What are the claim rules?
- Match the source to the sentence. A citation must directly support the nearby claim.
- Preserve the studied scope. Category-level tea research is not relabeled as proof for Sencha, Earl Grey, or another named style.
- Separate beverages and extracts. Concentrated green-tea supplements are not treated as ordinary brewed tea.
- Avoid false precision. Tealefy does not calculate exact caffeine, oxalate, EGCG, pH, or personal medical risk without valid measurements and a defensible model.
- No treatment promises. Claims such as “cures,” “detoxes,” “stops,” “safest,” and guaranteed outcomes are excluded.
What evidence is prioritized?
Government health guidance, systematic reviews, and meta-analyses take priority, followed by well-designed controlled human studies. Observational research, laboratory work, animal studies, and traditional use can provide context, but they cannot establish clinical efficacy on their own.
How should the health cards be read?
The colored status is a practical caution category, not a medical score. One evidence mark means general guidance or insufficient direct evidence, two means tea-category or botanical human evidence, and three means an established property that applies directly, such as whether an ingredient naturally contains caffeine. A stronger evidence match does not mean a drink is safe for every person.
How is safety handled?
Safety notes are general and deliberately conservative. Pregnancy, childhood, liver or kidney disease, allergies, surgery, and medicine use can change what is appropriate. Individual advice belongs with a clinician or pharmacist who knows the person and product.
What can I expect from a calculator?
Each calculator explains its inputs, units, assumptions, limitations, related tools, and relevant equipment. Results are estimates or starting ranges unless a measured product value is supplied; they are not personal medical recommendations.
How are corrections handled?
If a claim or link is wrong, the claim is removed or narrowed and a citation is replaced only when a directly relevant source exists. The page review date is updated so readers can identify the current version.
How is commercial content separated?
Affiliate links are labeled. Current price, inventory, seller, rating, and offer details remain on the retailer and should be checked there. An affiliate relationship never increases a health claim’s evidence grade.