Continuous Glucose Monitoring

Track your glucose levels in real time with continuous glucose monitoring (CGM) devices such as FreeStyle Libre. CGMs provide valuable insights into how food, exercise, sleep, and daily habits affect glucose levels, helping support diabetes management, weight loss, and wider metabolic health goals.

Through 123Meds, you can access trusted CGM products through our UK-registered online pharmacy service, with fast and discreet delivery direct to your door.

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Continuous glucose monitoring (CGM) devices are wearable sensors that track glucose levels throughout the day and night. Unlike traditional finger-prick testing, CGMs provide real-time glucose readings, helping users better understand how food, exercise, sleep, stress, and daily habits affect glucose levels.

CGM devices are commonly used by people living with diabetes, but they are increasingly being used to support wider metabolic health, weight management, and lifestyle monitoring goals.

One of the most widely used CGM systems in the UK is the FreeStyle Libre range, which uses a small sensor worn on the back of the arm to continuously measure glucose levels and send readings directly to a smartphone or reader device.

CGM sensors measure glucose levels in the fluid beneath the skin using a small wearable sensor. The sensor continuously records glucose readings throughout the day, allowing users to monitor trends and patterns over time.

Most sensors are worn for up to 14 days before replacement and can provide alerts, historical trends, and detailed glucose data through a connected mobile app.

Unlike standard blood glucose testing, CGMs allow users to see how glucose levels change in response to:

Meals
Exercise
Sleep
Stress
Illness
Medication

This can help support more informed lifestyle and treatment decisions.

Continuous glucose monitoring can help users:

Identify glucose spikes and patterns
Better understand how foods affect glucose levels
Monitor glucose trends throughout the day
Support diabetes management
Support weight loss and metabolic health goals
Reduce the need for routine finger-prick testing

For many people, CGMs provide a clearer picture of overall glucose control and daily metabolic health.

CGM devices are commonly used by people with Type 1 or Type 2 diabetes who need to regularly monitor glucose levels. However, they may also be used by individuals looking to better understand their metabolic health or support lifestyle and weight management goals.

Through 123Meds, you can access trusted CGM products through our UK-registered online pharmacy service, with fast and discreet delivery direct to your door.

Frequently asked questions

What is a continuous glucose monitor (CGM)?
A continuous glucose monitor is a wearable sensor that tracks glucose levels throughout the day and night. CGMs provide real-time readings and trends without routine finger-prick testing.
How does FreeStyle Libre work?
FreeStyle Libre sensors are worn on the back of the upper arm and measure glucose levels in the fluid beneath the skin. Readings can be viewed using a compatible smartphone app or reader device.
Do I need diabetes to use a CGM?
CGMs are commonly used by people with diabetes, but some people also use them to better understand their metabolic health, lifestyle habits, or weight management goals.
How long does a FreeStyle Libre sensor last?
Most FreeStyle Libre sensors are designed to be worn continuously for up to 14 days before replacement.
Does wearing a CGM hurt?
Most people experience minimal discomfort when applying or wearing a CGM sensor. The sensor is small and designed for continuous everyday wear.
Can I shower or exercise while wearing a CGM?
CGM sensors are generally designed to remain in place during normal daily activities, including showering and exercise. Always follow the manufacturer’s instructions for use.
Are CGMs a replacement for medical advice?
No. CGMs provide useful glucose data, but they should not replace professional medical advice, diagnosis, or treatment. Speak to your healthcare professional if you have concerns about your glucose levels or health.
Can I buy FreeStyle Libre online?
Eligible customers may be able to purchase FreeStyle Libre products through our UK-registered online pharmacy service, subject to suitability checks where required.