Everything DoseRank tracks on the green tea shelf — Huperzine A. The category itself is never ranked: 48 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing green tea supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Activities of daily livingCapacity to complete routine self-care activities independently.2 rankedStrong
Ketone levelsCirculating ketone concentrations, relevant in fasting or ketogenic states.2 rankedStrong
Potassium statusBody potassium balance.13 rankedStrong
Strength performanceMaximum or functional force production.2 rankedStrong
TolerabilityOverall ability to continue the intervention without unacceptable side effects.3 rankedStrong
Sodium statusBody sodium balance.16 rankedStrong
MalabsorptionImpaired absorption of nutrients from the gut.6 rankedStrong
Swelling or inflammationVisible or symptomatic tissue inflammation.4 rankedModerate-strong
FerritinMarker of iron stores.11 rankedStrong
HemoglobinBlood oxygen-carrying protein concentration.11 rankedStrong
Omega-3 indexRed blood cell EPA+DHA content reflecting omega-3 status.5 rankedStrong
ThermogenesisHeat production and metabolic energy expenditure.23 rankedStrong
Resting energy expenditureCalories burned at rest; marker of basal metabolism.23 rankedStrong
Aspartate aminotransferase (AST)Enzyme used to assess liver and muscle injury.2 rankedStrong
Power outputAbility to generate force rapidly.4 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best green tea supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 48 products against that goal's trials.