Getting enough sleep not only helps you feel comfortable, but also helps improve mental performance and enhance overall health. However, for many reasons, not everyone is eligible to meet the scientific sleep and rest time.

There are many different reasons why we cannot sleep at night, such as caffeine, noise, illness... Recently, researchers have added another cause of insomnia that many people have never thought of, which is LED energy-saving light bulbs that are turned on when it is dark.

Sleep is important for memory consolidation, so disrupted sleep can lead to memory loss. Experts also think that sleep problems may contribute to the progression of Alzheimer's disease, a type of dementia.

Deep and quality sleep plays an important role in helping the body rest and restore energy. The minimum sleep time for each person can be from 7 to 9 hours per night. However, whether the sleep is deep or not depends on other factors. Read on to know what deep sleep is? Its role and function for human health.