Understand Substances That Affect Sleep
_______ that make it harder to sleep can help you fall asleep more quickly and sleep more deeply. One example of a substance that interferes with sleep is caffeine. Caffeine is a substance that increases _______ , _______ , and _______ . This temporary increase makes it difficult to sleep. _______ drinks, foods, and medications that contain caffeine can help you sleep better. Some products that contain _______ coffee, chocolate, energy drinks, soft drinks, nonherbal teas, and diet pills.
Consuming certain substances can also calm the body and help you sleep better. For example, _______ is an amino acid that can help _______ , which aid in sleep. Bedtime snacks that contain tryptophan include a turkey sandwich, glass of milk, or banana. Figure 4.15 lists other foods and drinks that may help people sleep. Avoid eating _______ or snacks shortly before bedtime.
Sleep _______ and sleep _______ , such as melatonin, can also help a person sleep. A person should talk with a doctor before taking these medications and supplements, however. Sleep medications and supplements can have side effects such as dizziness, nausea, and headaches. They can also lead to dependence and _______ sleep issues.