Sleep glossary
melatonin
Updated
Product pages may mention melatonin when discussing light, darkness, and timing, but this site avoids supplement advice.
Plain-English definition
Melatonin is a hormone involved in the body's sleep-wake timing.
Product pages may mention melatonin when discussing light, darkness, and timing, but this site avoids supplement advice.
Why it matters
Understanding the term helps readers see why bright light and darkness are discussed in sleep routines.
Buying relevance
Use this term as a practical buying clue, then check the current manufacturer wording, setup guidance, materials, and returns policy. It should not be treated as a medical claim or a guarantee of how a product will work for you.
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