This particular study looked at inflammation through imaging (CT scans) as part of Biograph's $17,500 program. You can get at the underlying signal fairly cheaply through a simple blood test (hs-CRP).

It's fairly well-known that inflammation is an independent risk factor for heart disease, alongside LDL cholesterol (or ApoB) and blood pressure: https://www.empirical.health/blog/inflammation-and-heart-hea...

The American College of Cardiology looked at a bunch of inflammation biomarkers and standardized on hs-CRP: https://www.jacc.org/doi/10.1016/j.jacc.2025.08.047