A free, honest guide to supplements.
Stack is a free guidance tool for supplements and health devices — not a webshop. No account, no payment card. A 5-minute screening of your goals, lifestyle, medication and budget builds your personal stack.
Start your free screeningTransparent evidence grades
Every item gets an A/B/C grade so you know exactly how strong the evidence is.
Foundation → targeted → advanced
Your stack is prioritised in a clear order, so you build on solid ground first.
What we leave out — and why
Stack also tells you what has deliberately been left out, and the reasoning behind it.
A — Consistent human RCTs
B — Promising or mixed human evidence
C — Early, mechanistic or observational
Screened for interactions
Your screening checks for possible interactions with medication and contraindications before anything is suggested.
Editorially independent
No paid placements. Affiliate links are always clearly labelled. EU regulation is respected — for example NMN is handled correctly. Editorial responsibility: Ulrik Ditlev Eriksen. Available in Danish and English.
Talk to your doctor before combining supplements with medication, and never change your medication based on this tool.
Important
Longevity Institute and Vila Health provide health guidance based on lifestyle science. We are not a medical device, and we do not diagnose, treat or cure medical conditions. Always consult qualified health professionals about medical concerns. Our aim is to supplement — not replace — professional care.
Correlation is not causation. The figures cited come from large observational studies and randomised trials as referenced; individual results vary. Scores are a marker of progress — not a diagnosis.