Data is only as strong as its origin. We rely on the world's most trusted medical and scientific authorities.
At ShapeUpAmerica, we adhere to the principle of Primary Sourcing. This means that whenever possible, we derive our formulas and classifications directly from the original peer-reviewed studies or the official clinical guidelines published by national and international health agencies.
We do not rely on second-hand interpretations of medical data. Each tool on this platform lists the specific peer-reviewed source used in its development.
We follow standard academic citation practices. Every calculator includes an "Assumptions" and "Checklist" section that clarifies the conditions under which the formula is valid, as defined by its original authors.
Our team monitors major journals including The Lancet, JAMA, and The New England Journal of Medicine for updates to population-wide health markers and benchmarks.
If you are a medical researcher or health official and would like to suggest a primary source for inclusion or update, please visit our contact page to connect with our clinical review board.