What a regrade notice contains
Grades change when the evidence changes, and every review on this site states in advance what would raise and lower its grade. When one of those conditions is met the review is regraded, the page records the change and the reason rather than being quietly rewritten, and the notice tells you which claim moved, which way, and what reported. That is the whole of it. If no grade moves in a given month, no email is sent that month.
What is done with your address
An email address and nothing else. No name is asked for and no telephone number is asked for. It is not sold, it is not passed to a third party, and it is not used for promotions. Every email carries a link to stop the notices, and if you would rather the address were deleted outright, ask and it is deleted. How this journal is funded, and how corrections and competing interests are handled, is set out in full in the editorial policy. If anything here is wrong, or you did not mean to subscribe, the contact page is answered.
Where to start while you wait
The grading methodology is the thing to read first, because a grade on this site only means something once you know what it attaches to and what caps it.
- 01
How we grade evidence
Four bands from A to D, two kinds of claim, and the rules that cap a grade however much has been published. A grade attaches to one written claim, never to a substance.
Methodology - 02
The reviews
One stated claim per review, graded, with what would raise and lower the grade written out in advance. Supplements, drugs and interventions are treated the same way.
Reviews - 03
The explainers
How to read a clinical trial, why surrogate endpoints mislead, what a biological age test measures, and how supplements are regulated in the United Kingdom.
Explainers - 04
The analysis
Where the longevity field is moving commercially faster than it is moving scientifically, and how to tell the difference when something is described as revolutionary.
Analysis