How Sleep Affects Your Appetite and Weight

How much sleep do adults need?

U.S. health agencies and sleep experts recommend that adults get at least 7 hours of sleep per night on a regular basis. Yet roughly one in three American adults reports usually getting less than that.

The connection between sleep and weight

Research has linked short sleep with a higher risk of weight gain and obesity. Scientists are still studying exactly why, but several factors appear to play a part:

• Appetite hormones: sleep restriction can affect hormones involved in hunger and fullness, including ghrelin and leptin.
• Cravings: when you're tired, high-calorie, sugary and salty foods can feel more appealing.
• More time to eat: staying up late creates more opportunities for evening snacking.
• Less energy to move: fatigue makes it harder to exercise or stay active during the day.

In other words, poor sleep doesn't directly cause weight gain, but it can make healthy choices feel harder.

Practical tips for better sleep

• Keep a consistent schedule. Go to bed and wake up at about the same time every day, including weekends.
• Create a wind-down routine. Dim the lights and do something relaxing, such as reading or stretching, for 30 to 60 minutes before bed.
• Limit screens before bed. Try putting your phone away and keeping devices out of the bedroom.
• Make your bedroom sleep-friendly. Keep it cool, dark and quiet.
• Watch caffeine and alcohol. Caffeine can stay in your system for hours, and alcohol can disrupt sleep later in the night.
• Be active during the day. Regular physical activity can help you fall asleep more easily, though very intense exercise right before bed may not suit everyone.
• Avoid large meals late at night. A heavy meal close to bedtime can make it harder to sleep comfortably.

When to talk with a doctor

If you regularly have trouble falling or staying asleep, snore loudly, wake up gasping, or feel very tired during the day despite enough time in bed, talk with your healthcare provider. Sleep disorders such as sleep apnea and insomnia are common and treatable, and sleep apnea is more common in people with excess weight.

Putting it together

Good sleep works alongside balanced eating and regular activity. If you're building healthier habits, consider making sleep one of your goals. Our healthy weight loss guide covers the full picture.