Strength of Evidence Ratings


We built Wellcome Care to act as a reliable fact-checker and a source of what health and wellness treatments have proof of working. There are no shortcuts here. We review mountains of available data before each article is written.

Our research team developed a rating scale to standardize the assessment of evidence for each topic. Included in each article is an evidence rating of A, B, C, D, or F. See below for more detailed definitions:

Wellcome Care Strength of Evidence Ratings

The above snapshot helps you quickly understand how well the topic has been studied and the overall quality of available research. Our hope with this rating system is to provide a straight-forward translation of a large body of research into a simple “grade” that can help support your health decisions


Last updated: Sept. 15, 2020