What makes people sleepy?

The levels of melatonin in the body normally increase after darkness, which makes you feel drowsy. The change in melatonin during the sleep/wake cycle reflects circadian rhythms. During sleep, the hypothalamus also controls changes in body temperature and blood pressure.

nichd.nih.gov - What makes us sleep? | NICHD

What should you not take with fiber?

Fiber supplements can decrease the absorption of certain medications, such as aspirin, carbamazepine (Carbatrol, Epitol, others) and others. Fiber...

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How long should I cleanse my body?

Moderate cleanses of 4-6 days are suitable to move along more unwanted weight combined with the above results to a greater extent, plus additional...

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Your body has a natural clock, called a “circadian clock,” that helps you regulate your sleep. The word “circadian” refers to rhythmic biological cycles that repeat about every 24 hours. These cycles are also called circadian rhythms. Your circadian clock is strongly influenced by light, which is the reason why people living in different regions have different sleeping schedules. This is also the reason why people who work night shifts can have difficulty falling asleep or staying awake.2 At bedtime, when your drive to sleep is greatest, your sleep drive and circadian clock work together to allow you to fall asleep. After you have slept for some time, when your drive to sleep is lower, your circadian clock allows you to stay asleep until the end of the night.

Circadian Rhythms

Circadian rhythms regulate changes in the brain and body that occur over the course of a day. Your body’s biological clock controls most circadian rhythms. This clock is found in a region of the brain called the hypothalamus (pronounced hy-puh-THAL-uh-muhs). The hypothalamus affects sleep and arousal. Light detected by special neurons in the eye sends signals to many areas of the brain, including the hypothalamus. Signals from the hypothalamus travel to different regions of the brain, including the pineal (pronounced PIN-ee-uhl) gland. In response to light, such as sunlight, the pineal gland turns off the production of melatonin, a hormone that causes a feeling of drowsiness. The levels of melatonin in the body normally increase after darkness, which makes you feel drowsy. The change in melatonin during the sleep/wake cycle reflects circadian rhythms. During sleep, the hypothalamus also controls changes in body temperature and blood pressure. Because circadian rhythms are controlled by light, people who have some degree of blindness in both eyes may have trouble sleeping. For more information about how vision affects circadian rhythms, visit the National Institute of Neurological Disorders and Stroke page on understanding sleep.2

What foods cause plaque in arteries?

The study, published Aug. 13 in Science, suggests that consuming food rich in saturated fat and choline - a nutrient found in red meat, eggs and...

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Does B12 speed up your metabolism?

B12 works by converting the food we eat into sugar and other types of fuel that keep the body running smoothly. B12 is often associated with weight...

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Is Diet Coke healthy?

The artificial sweeteners and other chemicals currently used in diet soda are safe for most people, and there's no credible evidence that these...

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What is a healthier substitute for orange juice?

Lemon juice is a great all-around orange juice substitute. It can be used in just about any cooking or baking application. If you are worried about...

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A scrumptious morning smoothy based on the diets of among the healthiest, longest-living hamlet in the world.

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Is juicing good for your colon?

During a colon cleanse, it is recommended to replace solid foods with fresh vegetable juice for one to two days. Fresh vegetable juice helps remove...

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How many minutes should I workout?

As a general goal, aim for at least 30 minutes of moderate physical activity every day.

Last updated May 2, 2021