What the Research Says
Medically reviewed by Arno Kroner, DAOM, LAc on May 14, 2020
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While it’s true there is scientific evidence that CBD can help with sleep, many of the human studies examining this association are small, and/or they lack a control group.1
In addition, some studies have examined the combined role of THC and CBD for sleep, which we are not addressing here.
That said, here are examples of research studies supporting the use of CBD for improving sleep:
- In a study of 72 adults with primary symptoms of anxiety and poor sleep, over 65% of the patients improved their sleep quality scores after taking daily CBD (average dose of 25 milligrams) for one month.2 This improvement was sustained over the duration of the study (a total of three months).
- In a study of 21 patients with Parkinson’s disease without dementia or other psychiatric conditions, participants experienced improved quality of life (including sleep) when taking 300 milligrams of CBD per day.3
- In a case series of four patients with Parkinson’s disease and REM sleep behavior disorder, CBD (75 to 300 milligrams per day for 6 weeks) reduced the frequency of rapid eye movement (REM) sleep behavior events.4
- In a pediatric case study of a 10-year-old patient with posttraumatic stress disorder (PTSD), the patient had an increase in sleep quality and quantity and decrease in anxiety after taking 25 milligrams of CBD at bedtime and 6 to 12 milligrams of CBD sublingual spray during the day (as needed for anxiety).