Can sleep apnea cause diabetes?

Sleep apnea does not mean you will develop diabetes. However, obstructive sleep apnea is associated with insulin resistance and an increased risk of developing type 2 diabetes.

Can sleep apnea make diabetes worse?

It can. Repeated sleep disruption and intermittent drops in oxygen may reduce insulin sensitivity and make glucose regulation more difficult.

Does sleep apnea affect morning blood sugar?

Potentially. Sleep apnea can affect hormones and insulin sensitivity overnight, which may contribute to higher glucose levels in some people. However, high morning blood sugar can have many causes, including the dawn phenomenon, medication or insulin needs, food intake, and other factors. If your fasting readings are consistently elevated, see our guide to High Morning Blood Sugar for other possible causes.

Will CPAP lower my A1C?

Not necessarily. Research on CPAP and glycemic control has produced mixed results. CPAP is effective for treating obstructive sleep apnea, but it should complement rather than replace your diabetes treatment plan.

Should people with diabetes be screened for sleep apnea?

People with diabetes should be assessed for sleep health and symptoms of sleep disorders. Symptoms such as loud snoring, excessive daytime sleepiness, and witnessed pauses in breathing are particularly important reasons to discuss sleep apnea evaluation with your healthcare provider.

sleep health

Diabetes

Sleep Apnea and Diabetes: What’s the Connection?
ByTracy Trask August 31, 2026September 1, 2026

Read More Sleep Apnea and Diabetes: What’s the Connection?