A very sensitive liver function enzyme test, the GGT, has been shown to be a biomarker for cardiac risk, oxidative stress and inflammation. Researchers in Germany found the GGT to be an independent risk factor for vascular disease, and it’s incredibly cheap at about $10 per test. If your GGT level is less than 13, your chances of a heart attack are practically nonexistent. The higher it goes, the worse your risk. The best way to lower liver enzymes is milk thistle (silymarin).
See the winter issue of Holistic Primary Care (subscription required) P. 6 and Meisinger C, et.al. Journal of Internal Medicine 2005; 258:527-535.