Which famous people use Levels continuous glucose monitor?

Dave Asprey

Asprey told GQ he had been using a Levels continuous glucose monitor; the article notes he is an investor in the company.

“I've been using a continuous glucose monitor from a company called Levels Health”Dave Asprey

Source: The Real-Life Diet of Dave Asprey, Who Thinks Coffee Is a Superfood (GQ, republished by Levels) (interview, 28 Jan 2021)