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2. Melatonin - Wikipedia

   en.wikipedia.org/wiki/Melatonin

   Melatonin, an indoleamine, is a natural compound produced by various organisms, including bacteria and eukaryotes. [1] Its discovery in 1958 by Aaron B. Lerner and colleagues stemmed from the isolation of a substance from the pineal gland of cows that could induce skin lightening in common frogs.

3. Sleep cycle - Wikipedia

   en.wikipedia.org/wiki/Sleep_cycle

   Sample hypnogram showing one sleep cycle (the first of the night) from NREM through REM. The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and ...

4. Light effects on circadian rhythm - Wikipedia

   en.wikipedia.org/wiki/Light_effects_on_circadian...

   Cortisol levels are high upon waking and gradually decrease over the course of the day, melatonin levels are high when the body is entering and exiting a sleeping status and are very low over the course of waking hours. [9] The earth's natural light-dark cycle is the basis for the release of these hormones. [13]

5. Not Everyone Needs the Same Amount of Sleep. Here's Why - AOL

   www.aol.com/not-everyone-needs-same-amount...

   Your body is a walking clock, built to respond to the cycles of the day. ... “When we learn and expose ourselves to more information, there’s actually an effect where you get more deep sleep ...

6. The 7 Most Effective Natural Sleep Aids for Your Best Sleep ...

   www.aol.com/lifestyle/7-most-effective-natural...

   Magnesium is another common natural sleep aid that may help improve sleep by relaxing the body’s nervous system which has a very calming effect on the body, and can be helpful in the evening ...

7. Going to bed at 9 p.m. every night could improve your health ...

   www.aol.com/finance/going-bed-9-p-m-105200520.html

   The body adjusts to a natural sleep cycle based on the sun and our internal body clock. Due to this, some experts argue that the deepest sleep happens between 10 p.m. and 2 a.m.

8. Circadian rhythm - Wikipedia

   en.wikipedia.org/wiki/Circadian_rhythm

   A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours. Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous ) and responds to the environment (is entrained by the environment).

9. One In Three Americans Don't Feel Rested—These Sleep Masks ...

   www.aol.com/one-three-americans-dont-feel...

   Luckily, there’s an easy way to help you get reacquainted with your natural sleep cycles: a sleep mask. ... Natural Silk Sleep Mask. This product has more than 11,000 reviews on Amazon—happy ...