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Does a lack of sleep cause obesity?

No, but it can certainly contribute to it. Lack of sleep will slow down your metabolism which can lead to weight gain. It will also increase levels of Cortisol, which will increase your appetite and will decrease a hormone called Leptin, while increasing a hormone called Ghrelin. Leptin is the “stop” hormone that tells your body to stop eating because it feels full, while Ghrelin is the “go” hormone and it tells your body to keep eating. When you have less “stop” and more “go” you have a recipe for weight gain. 

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.