CBD Affects Sleep Based on How Much is Taken
In a 2014 study by the Anahuac Mayab University in Mexico, rats given a low dose of CBD became more active. Conversely, higher doses (10-40 mg/ kg) were found to promote additional sleep in the rats.
Human studies appear to mirror these results. In a 2004 report put out the Center for Human Sciences, they found that test subjects given higher doses of a CBD and THC combination (15 mg of each) had increases sleepiness and slower reaction time. Subjects given lower doses (5 mg CBD and 5 mg THC) had increased wakefulness and a higher level of concentration.
According to these results, it appears that if you would like to avoid an increase in sleepiness, take smaller doses, and it should have the opposite effect which will be increased activity. On the other hand, if you’re using CBD to help with sleep, take a slightly higher dose, and you’ll feel more relaxed, and get a better night’s sleep.
CBD Affects Sleep Based on the Time of Day it’s Taken
The other factor that affects whether CBD will make us sleepy, is the time of day the dose is taken.
In another rat study by the National Autonomous University of Mexico, researchers found that by giving the rats CBD during their normal sleep time, the rats experienced an increase in sleepfulness. However, when they instead gave the rats their CBD dosage during their normal waking hours, the rats became more active.
According to Natural Wellness, the reason CBD affects you differently when taken at different hours is due to the body’s natural production of melatonin. The hormone that’s responsible for making you sleepy, Melatonin is your body’s way of regulating a normal sleep cycle. The body releases melatonin when it expects to feel sleepy, so if you normally go to sleep every night at 10 p.m., your body will start producing melatonin shortly before that time, to get you ready for sleep.