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melatonin Definition

mela·to·nin (mel′ə tōnin)

noun

a hormone, CHNO, produced by the pineal body, that lightens skin pigmentation, inhibits estrus, etc.: its secretion is inhibited by sunlight

Etymology: mela(no)- + ton(ic) + -in

melatonin Usage Examples

Converse of object

  • secrete: People with SAD may respond to a decrease in light by secreting more melatonin than people without SAD.
  • suggest: Melatonin Years ago, a preliminary study suggested that melatonin may help stabilize the condition of some people with advanced cancers.
  • produce: The magnets in the pillow stimulate the brain to produce more melatonin.
  • call: This assists your brain to produce a chemical called melatonin, a natural sedative.
  • take: Then began taking the fifth cranial melatonin versus placebo skyrocketing adding to.
  • give: One study gave melatonin at night in combination with the drug triptorelin to men with metastatic prostate cancer.

Preposition: at

  • night: Serotonin is further converted into melatonin at night to promote sleep.

Adjective modifier

  • exogenous: The efficacy and safety of exogenous melatonin for primary sleep disorders: A meta-analysis.
  • less: The less melatonin there is, the higher the chance of an ovulation.

Modifies a noun

  • secretion: One case showed that propranolol, a melatonin secretion blocker, given in the morning helped lift SAD symptoms by shifting the circadian rhythm.
  • supplement: And perhaps they'll find it with melatonin supplements.
  • production: Davis et al report a reduction in night-time melatonin production in women exposed to elevated magnetic fields in the home.
  • level: Adults with insomnia have been shown to have lower melatonin levels.
  • hypothesis: We must wait for more data before ascribing too much strength to the melatonin hypothesis of SAD.
  • supplementation: It did suggest there is no current rationale for melatonin supplementation in people with fibromyalgia.

Noun used with modifier

  • hormone: It releases the hormone melatonin which acts on the ovaries to inhibit the estrus cycle.
  • sleep: All of these contain the amino acid tryptophan which helps your body produce the sleep hormone melatonin.

Preposition: in

  • treatment: A new study has unlocked the key role of melatonin in the treatment of cancer.
  • body: Levels of melatonin in the body fluctuate with the cycles of night and day.

Preposition: for

  • disorder: The efficacy and safety of exogenous melatonin for primary sleep disorders: A meta-analysis.

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