3  How to get your CGM

How to do your own personal science experiments with continuous glucose monitoring.

The FreeStyle Libre is available over-the-counter at most pharmacies throughout the world (including Mexico and Canada), but requires a doctor’s prescription in the United States.

A month’s supply of sensors costs under US$100, so don’t bother trying to get your health insurance to reimburse you unless you have a specific medical reason, in which case consult your doctor.

There are three ways to get one in the US:

  1. Ask your doctor to prescribe one for you. The Freestyle Buying Guide gives detailed information about how the product works, and what to tell your doctor. Most doctors will be happy to prescribe it if you explain that you’ll be paying out of pocket.

  2. Tastermonial (tastermonial.com) will connect you with a doctor who can provide a prescription for $29. This is the easiest solution for most people.

  3. If you’re traveling to Canada, Mexico, or other countries, you can pick them up locally, or you can order one to be shipped into the US. Michael Cohn describes how he got one from Canada for about $100

3.1 What to buy

Buy the 14-day sensor by itself. If you have an iPhone 7 + or an Android, don’t bother buying the Reader (which is an additional US$200).

3.2 Companies and CGM-Based Products

Several companies will give you a month’s worth of CGM with an app and nutrition advice for under $500. See link below.

January, Inc.

https://january.ai/ $499 4-week program includes 2 Freestyle Libre devices and an app to guide your eating, fasting, and exercise choices.


https://www.nutrisense.io/: Join their “cohort” and receive 2 CGM devices/month and 24/7 nutritionist advice with an app that tracks your glucose, fasting, and more.

Steady Health

https://steady.health/ a San Francisco-based clinic providing CGM-centric diabetes care. Their programs cost about $60 / month and include AI-aided smartphone-based coaching and education around food and exercise, plus data interpretation with an endocrinologist. This is a good choice if your doctor has diagnosed you with diabetes.

Levels Health

https://www.levelshealth.com/ offers “metabolic health” services, including a CGM and nutritionist consultation for about $400/month. You’ll need to request access for a specific quote and availability.