Ranked by how much each one moves health across a whole population, not by what sells supplements. Every single item carries the sources it came from, linked, so you can open them and check us.
Three taps is enough to start. The list reorders the moment you answer, and every field is skippable. Nothing leaves your device: what you enter is kept in this browser only, there is no account, no analytics and no server to send it to.
Used only for screening items and biology, never to guess anything else.
Sets latitude and typical UV, which change the vitamin D and sun items.
Nothing matches that.
These stay on the list. A fact you gave means a guideline puts them outside your group right now, for example a screening that starts at an age you have not reached.
Every item gets a score from 0 to 100 for population level impact. It combines how much the thing changes death and disease with how common the gap is. A change with a huge effect that almost nobody needs scores lower than a moderate change that almost everybody needs. The general list is that score, in order.
Tier 1 is WHO, CDC, NIH, NHS, USPSTF, ECDC, a national guideline or Cochrane. Tier 2 is a peer reviewed meta-analysis or large cohort. Tier 3 is a reputable secondary source such as Harvard Health, and it never stands alone. Every item carries at least one Tier 1 source.
Every source on this site is a link. No claim here is meant to be taken on trust: open the source, read the number, and if we got it wrong the source will say so. That is the whole point of building it this way.
You give a few facts. Each item can carry rules: a hard filter that decides whether it applies to you at all (sometimes a list of alternatives, where any one of them is enough), and boosts that add or subtract points. Your score for an item is its impact score plus every boost that fires. Nothing is hidden: a field you skip fires no rule, and a rule you never see cannot move anything. Here is every rule in the data, exactly as the engine reads it.
| Thing | When | Points | Reason shown to you |
|---|
This is not medical advice. It is a reading list with numbers attached. It cannot know your history, your medication or your risk, and a few items carry a note about when to talk to a clinician first. If something here contradicts what your doctor told you about your own body, your doctor has more information than this website does.
Data last reviewed . Built by Pawel Jozefiak.