

Supersapiens costs $196 for a four-week trial. (Higher blood-glucose levels can cause cellular and vascular damage very low levels can lead to feelings of fatigue and brain fog.) This score was based on my average glucose level each day, the number and steepness of post-meal spikes, and the amount of time I spent outside the Levels-defined optimal glucose range of 70 to 110 mg/dL. The Levels app took my CGM data, coupled with my entries for meals and exercise and other notes, and computed a daily metabolic score, expressed as a percentage. Watching my glucose level rise and fall through the day told a different, and more alarming, story than the static reading at my doctor’s office. The sensor took minute-by-minute readings, storing the data on my phone. I applied the half-dollar-sized disc to my upper arm, inserting a filament painlessly into my skin. A few weeks later, my Levels kit arrived, containing an Abbott FreeStyle Libre CGM that had been prescribed by a Levels doctor via telemedicine. (At or below 99 mg/dL is considered to be ideal 100 and above is cause for concern.) I’m good, I thought. My last fasting glucose test, a few weeks before I tried a CGM, had come out a reassuring 87 mg/dL.

More alarming, a 2019 study from the University of North Carolina at Chapel Hill estimated that only 12 percent of American adults are metabolically healthy, defined as having optimal (without medication) triglycerides, HDL cholesterol, blood pressure, blood glucose, and waist circumference.

But another 88 million have prediabetes, meaning they have higher-than-normal blood sugar-and the vast majority are not aware of it. Nearly 30 million Americans have been diagnosed with type 2 diabetes, defined as the body’s inability to manage blood-sugar levels.
