My Levels app is showing 94% time in range. What does that actually mean for my heart?

It means your glucose was in the 70–140 mg/dL range for 94% of the monitoring period, which is genuinely good metabolic function. It means your endothelium is experiencing less oxidative stress from glucose spikes than a man spending 15–20% of his day above 140 mg/dL. It reduces your rate of glycation-driven arterial aging.

What it does not tell you: your ApoB particle count, your Lp(a) level, your hs-CRP, your coronary artery calcium score, or whether the plaque-forming process that kills men at 53 has been quietly advancing in your coronary arteries for the past nine years. The man who came into my clinic with a 94% time-in-range trace also had an ApoB of 161 mg/dL, Lp(a) of 82 nmol/L, and hs-CRP of 2.7 mg/L. His glucose was beautiful. His coronary arteries were not. (Lincoff et al., NEJM, 2023)

Cardiologist's calibrated position, Promising (2). 94% TIR is a metabolic achievement that reduces one component of cardiovascular risk. It is not cardiovascular reassurance.

What to do: Take the win for what it is. Then order the cardiac panel that covers what your CGM cannot see: ApoB, Lp(a), hs-CRP. If all of those come back in safe ranges alongside your excellent CGM data, that combination is genuinely reassuring. One without the other is incomplete.

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