If you suffer with problems surrounding sleep, such as insomnia, trouble falling asleep, or trouble staying asleep, CBD may help to relieve the causes of these issues. Sleep issues may be caused by stress, anxiety, depression, certain medications, physical conditions, and more. As mentioned previously, CBD may be able to help with chronic pain, migraines, and muscle pain. These may all be causes for lack of quality sleep. It is suggested that CBD can also help to reduce anxiety (see the anxiety section) - anxiety is a very common cause for disturbed sleep .
Using CBD may enhance the effectiveness of the human endocannabinoid system; a biological system that affects many physiological processes, including our sleep/wake cycles. The effects of CBD will vary depending on our individual biology, but if you are looking for a possible solution for your problems with sleep, CBD can be an excellent remedy to try. It is a safe and non-addictive alternative to traditional pharmaceuticals.
It is thought that CBD helps to regulate cortisol, which is a stress hormone that has a significant impact on non-REM sleep cycles . Furthermore, at high concentrations CBD directly activates the 5-HT1A serotonin receptor . This receptor is partly responsible for many processes, including sleep. This suggests that CBD may help the body to regulate our sleep patterns.
A study published in 2019 looked at how CBD may improve sleep . Participants were given 25mg of CBD each day. They found that 66.7% of participants reported having better sleep.
Other research suggests that CBD affects the human sleep cycle. A 2014 study found that CBD improved the symptoms of REM sleep behaviour disorder (RBD) - this is a disorder where a person acts out their dreams, experiences poor sleep, and has frequent nightmares  . A 2017 review of multiple studies into this topic concluded that CBD may be helpful in treating RBD .
CBD may also be effective at treating excessive daytime sleepiness. A 2014 review found that CBD could promote wakefulness in some instances; perhaps when used in smaller doses or when administered during the day  . Grogginess is a common symptom of insomnia, and promoting wakefulness during the day may also help improve sleep during night.
Better quality sleep can lead to reduced muscle pain (which can lead to improved muscle recovery), reduced anxiety, reduced stress, and a better general mood.