Sleeping With Light On May Increase Diabetes Risk

If you sleep with the light on, new research may keep you up at night. Several studies suggest that keeping the lights on at night may increase your risk for heart disease and type 2 diabetes.

Light helps the body’s internal clock govern a host of biological functions from temperature to the release of hormones and is synchronized to the external cycle of day and night.

Researchers from Northwestern University Feinberg School of Medicine found that people exposed to artificial light at night have worse glucose and cardiovascular regulation than those who sleep in the dark, something they suggest relates to the body being kept alert. Even a modest amount of light increases activation of the autonomic nervous system, which increases the heart rate and decreases insulin sensitivity.

Writing in the Proceedings of the National Academy of Sciences, the Northwestern researchers studied the heart rates and glucose tolerance of 20 people over the course of two nights. Ten of the participants spent both nights sleeping in dim light, while the other ten spent one night in a dimly lit room and the next night in a room with overhead lighting at around 100 lux, which is roughly equivalent to the amount of light on a cloudy day.

The results suggest that the group that spent a night with the lights on had higher insulin resistance in the morning, higher heart rates, and lower heart-rate variability.

Keep Your Blood Sugar In Check With CGM

In addition to shutting off the lights at night, exercise, a healthy diet, and keeping blood sugar levels as close to your target level as possible are all critical elements of staying healthy if you have been diagnosed with diabetes. One way to keep your blood levels in check is through Continuous Glucose Monitoring (CGM). It is a tested, approved, accurate, and easy-to-use transceiver device that helps those with diabetes monitor keep abreast of their blood sugar levels 24/7 without any need to stop what their doing to take a blood sample.

Speak with your doctor and contact us today to see if you qualify for CGM and access our guide to continuous glucose monitoring.


If you are not insured, or have a high deductible health insurance plan, you can still purchase the Freestyle Libre Reader and Sensors at extremely competitive prices. Prices starting as low as $99 per month

*Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol, when symptoms do not match system readings when you suspect readings may be in accurate, or when you experience symptoms that may be due to high or low blood glucose.

Reference 1: Data on file. Abbott Diabetes Care. 2, FreeStyle Libre 14 day User’s Manual

Indications and Important Safety Information

FreeStyle Libre and FreeStyle Libre 14 day Flash Glucose Monitoring systems are continuous glucose monitoring (CGM) devices indicated for replacing blood glucose testing and detecting trends and tracking patterns aiding in the detection of episodes of hyperglycemia and hypoglycemia, facilitating both acute and long-term therapy adjustments in persons (age 18 and older) with diabetes. The systems are intended for single patient use and require a prescription.

CONTRAINDICATIONS: Remove the sensor before MRI, CT scan, X-ray, or diathermy treatment.

WARNINGS/LIMITATIONS: Do not ignore symptoms that may be due to low or high blood glucose, hypoglycemic unawareness, or dehydration. Check sensor glucose readings with a blood glucose meter when Check Blood Glucose symbol appears, when symptoms do not match system readings, or when readings are suspected to be inaccurate. The system does not have alarms unless the sensor is scanned, and the system contains small parts that may be dangerous if swallowed. The system is not approved for pregnant women, persons on dialysis, or critically-ill population. Sensor placement is not approved for sites other than the back of the arm and standard precautions for transmission of blood borne pathogens should be taken. The built-in blood glucose meter is not for use on dehydrated, hypotensive, in shock, hyperglycemic-hyperosmolar state, with or without ketosis, neonates, critically-ill patients, or for diagnosis or screening of diabetes. When using FreeStyle LibreLink app, access to a blood glucose monitoring system is required as the app does not provide one. Review all product information before use or contact Abbott Toll Free (855-632-8658) or visit for detailed indications for use and safety information.html. . FreeStyle, Libre, and related brand marks are trademarks of Abbott Diabetes Care Inc. in various jurisdictions. Other trademarks are the property of their respective owners. ©2018 Abbott. ADC-09691 vLO 10/18