Humans have a natural circadian rhythm. This is why some people have nightmares and others get out of bed early. This cycle lasts 24 hours a day. It tells people when to go to bed and when to wake up. When the sun comes up, it's time to wake up. Circadian activity is associated with regulating the rhythms of the human body. When this rhythm is disturbed by certain circumstances, the placenta capsules regulate it. This improves the patient's sleep disturbances and prolongs their rest.