Obesity-related conditions
Sleep apnoea and the role of weight loss
Weight loss can improve obstructive sleep apnoea, but does not automatically replace treatments such as CPAP.
Educational adaptation of an article from the previous website • Content updated: 27 September 2026
What is sleep apnoea?
In obstructive sleep apnoea, the airway repeatedly narrows or closes during sleep, reducing or stopping breathing. This differs from central apnoea, which involves breathing control. Obesity is a risk factor for obstructive apnoea, but not everyone affected has obesity.
Which symptoms need assessment?
Loud snoring, witnessed breathing pauses, waking with choking, morning headaches and daytime sleepiness may suggest it. Diagnosis usually involves clinical assessment and a sleep study. If sleepiness affects alertness, avoid driving or dangerous machinery and seek assessment.
Treatment involves more than weight loss
Depending on severity and individual circumstances, CPAP, an oral appliance or other treatment may be recommended. Weight management and changes to some habits can help, but do not replace prescribed treatment. Plan care with your doctor or sleep clinic.
What role does bariatric surgery play?
In eligible people, bariatric surgery and the resulting weight loss can reduce obstructive apnoea severity. Complete resolution does not occur in everyone, and no operation is best for all affected people. After weight loss, reassessment and sometimes a repeat sleep study are needed before reducing or stopping CPAP.
What should you do before surgery?
Tell your surgeon and anaesthetist about diagnosed or suspected sleep apnoea. If you use CPAP, follow the centre's instructions about bringing and using the device. Do not stop treatment simply because weight loss has started; breathing management around and after surgery matters.
This article provides general information. Treatment and nutrition plans must fit your procedure, associated conditions and individual circumstances.
Sources and article history
Adapted and rewritten from an older article. Absolute claims, outdated prices and advice needing correction have not been republished unchanged.