If my CGM numbers look great, does that mean my heart is healthy?

No. A beautiful glucose curve tells your cardiologist that glycemic control is good. It tells nothing about ApoB, Lp(a), coronary artery calcium, or whether a plaque has been accumulating in your LAD for the past decade. A man with 94% time in range and an ApoB of 161 mg/dL is still depositing atherogenic particles daily. The glucose curve does not see them.

This is the most clinically significant gap in non-diabetic CGM use. Coronary artery disease is primarily a disease of atherogenic lipoprotein particles, specifically the particles counted by ApoB. Glucose optimization reduces endothelial oxidative stress and, over time, lowers triglycerides and improves insulin sensitivity. These are real cardiovascular benefits. They do not change the ApoB particle burden. A man can have perfect metabolic function and catastrophic lipid-driven atherosclerosis building in silence, and his CGM has no mechanism to detect it. (Sniderman et al., JAMA Cardiology, 2019)

Cardiologist's calibrated position, Unsupported (5) for the claim that good CGM data is sufficient cardiovascular reassurance. The metabolic-to-cardiac translation gap is real and documented. Glucose is one variable in a multi-variable equation.

What to do: Run your cardiac panel alongside your CGM data. Order ApoB and Lp(a) through any direct-to-consumer lab for under $80 combined. Add hs-CRP. If you have been using a CGM for three months and have not checked these numbers, you are reading one page of a five-page document.

For the full picture, read The CGM on Your Arm Doesn't Know Your Arteries.