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We follow the research and keep track of it. Each answer shows its source: the researcher with the video and the minute, or the study. We sell no supplements and take no affiliate money. Most tools need no account.
Built from 3,700+ hours of recorded interviews with 370+ researchers and doctors, plus 18,100+ research studies. Updated Oct 5, 2026.
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Type your list or snap a photo. One verdict per supplement, with the receipts. No account.
Check my stackAsk a health question and get the moments on tape that answer it, to the second, so you hear where the sources agree and where they split.
Paste a health claim you heard. See which sources back it, which push back, and the minute or the study behind each one.
Look up any supplement and see its verdict, worked out from every counted mention, with a receipt for each one.
Supplements ranked by the verdict on each one, worked out from every counted mention.
Every supplement side by side, each with its verdict and the receipts behind it.
BPC-157, retatrutide, GHK-Cu, TB-500: the FDA status of each peptide and what researchers say about it on tape.
A 1-minute quiz. Get a supplement list matched to your goals, with the evidence behind each pick.
How much should you take? See each dose claim on the record and the verdict on it.
Glycinate or threonate? Fish oil or krill? See each form claim on the record and the verdict on it.
Mineral and vitamin dosages: maintenance, therapeutic and upper limits, with the verdict on each nutrient.
Enter your supplement stack and monthly spend. See which supplements the evidence supports and which it does not.
On a GLP-1? Get a daily protein target to protect muscle, from targets researchers give on tape, plus a per-meal split and a muscle checklist.
Normal is not optimal. 13 questions, 3 minutes: how many of the optimal targets researchers set on the record you clear today, and the one holding you back most.
10 questions, 60 seconds. Get a healthspan score and the 3 habits costing you the most years, each tied to a report.
Enter your age, sex, and VO2 max (or a 12-minute test distance). See your percentile vs population norms — and what it means for how long you live.
Your Zone 2 range at your age — under both zone models, because they disagree by about 10 beats. Plus the talk test, for when you do not trust either.
The ACE category chart for men and women, and the honest part most charts skip: what the number does and does not tell you as you age.
Published HRV norms by age band, and the rules researchers give on tape for reading a number: your own 30-day baseline, and what size of drop means stop.
Divide your waist by your height. The published categories, and the cutoffs researchers name on tape for men and women.
Ask on the web or on WhatsApp: send a question, a voice note or a photo of your bloodwork.
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