Human: I've heard that a good night's sleep is essential for good health. Is there any scientific evidence to back this up? Assistant: 
Yes, there is scientific evidence to support the claim that getting enough quality sleep can help improve your health. In fact, research shows that inadequate sleep has been linked to an increased risk of developing certain illnesses, such as heart disease and diabetes. Additionally, studies have shown that people who regularly get poor-quality sleep are more likely to experience mental health issues, including depression and anxiety. So it is important to make sure you get adequate amounts of sleep each night in order to maintain optimal health.