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Sleep

Why the day's most reliable growth hormone pulse comes in early deep sleep, what sets the body clock, what improves sleep, and the evidence on melatonin, magnesium, glycine and other sleep aids.

HormonesUpdated

15 min read72 sources

One night of sleep: deep sleep comes mostly in the first half, and growth hormone's most reliable pulse arrives with the first stretch of deep sleep. AwakeREMLightDeepgrowth hormone11pm1am3am5am7amThe first deep sleepgrowth hormone's most reliable pulse comes with it

Growth hormone is released in pulses, and its most reproducible pulse follows sleep onset.

In this article

  • Sleep and growth in children
  • The body clock
  • The growth plate's own clock
  • Improving sleep
  • Compounds
  • Summary

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Educational content, not medical advice. Nothing here is a recommendation to take or stop taking anything — talk to a doctor about your own situation.