Melatonin

Melatonin

Overview

What is melatonin?

Melatonin is a hormone made by the pineal gland, a small gland in the brain. Melatonin helps control your sleep and wake cycles. Very small amounts of it are found in foods such as meats, grains, fruits, and vegetables. You can also buy it as a supplement.

What does natural melatonin do in the body?

Your body has its own internal clock that controls your natural cycle of sleeping and waking hours. In part, your body clock controls how much melatonin your body makes. Normally, melatonin levels begin to rise in the mid- to late evening, remain high for most of the night, and then drop in the early morning hours.

Light affects how much melatonin your body produces. During the shorter days of the winter months, your body may produce melatonin either earlier or later in the day than usual. This change can lead to symptoms of seasonal affective disorder (SAD), or winter depression.

Natural melatonin levels slowly drop with age. Some older adults make very small amounts of it or none at all.

Why is melatonin used as a dietary supplement?

Melatonin supplements are sometimes used to treat jet lag or sleep problems (insomnia). Scientists are also looking at other good uses for melatonin, such as:

  • Treating seasonal affective disorder (SAD).
  • Helping to control sleep patterns for people who work night shifts.
  • Preventing or reducing problems with sleeping and confusion after surgery.
  • Reducing chronic cluster headaches.

Is taking a melatonin dietary supplement safe?

In most cases, melatonin supplements are safe in low doses for short-term and long-term use. But be sure to talk with your doctor about taking them.

Children and pregnant or nursing women should not take melatonin without talking to a doctor first.

Melatonin does have side effects. But they will go away when you stop taking the supplement. Side effects may include:

  • Sleepiness.
  • Lower body temperature.
  • Vivid dreams.
  • Morning grogginess.
  • Small changes in blood pressure.

If melatonin makes you feel drowsy, do not drive or operate machinery when you are taking it.

During health exams, tell your doctor if you are taking melatonin. And tell your doctor if you are having trouble sleeping (insomnia), because it may be related to a medical problem.

In adults, melatonin is taken in doses from 0.2 mg to 20.0 mg, based on the reason for its use. The right dose varies widely from one person to another. Talk to your doctor to learn the right dosage and to find out if melatonin is right for you.

Where can you find a melatonin supplement?

You can buy melatonin supplements without a prescription at health food stores, drugstores, and online. Melatonin should only be taken in its man-made form.

References

Other Works Consulted

  • Melatonin (2009). Review of Natural Products. St. Louis: Wolters Kluwer Health.
  • Rajaratnam SM, et al. (2009). Melatonin and melatonin analogues. Sleep Medicine Clinics, 4: 179–193.

Credits

Current as of: May 28, 2019

Author: Healthwise Staff
Medical Review: Kathleen Romito, MD - Family Medicine
Alfred J. Lewy, MD, PhD - Psychiatry

Disclaimer: The information contained in this website, and its associated websites, is provided as a benefit to the local community, and the Internet community in general; it does not constitute medical advice. We try to provide quality information, but we make no claims, promises or guarantees about the accuracy, completeness, or adequacy of the information contained in or linked to this website and its associated sites. As medical advice must be tailored to the specific circumstances of each patient and healthcare is constantly changing, nothing provided herein should be used as a substitute for the advice of a competent physician. Furthermore, in providing this service, Adventist HealthCare does not condone or support all of the content covered in this site. As an Adventist health care organization, Adventist HealthCare acts in accordance with the ethical and religious directives for Adventist health care services.

Find a Doctor

Find an Adventist HealthCare affiliated doctor by calling our FREE physician referral service at 800-642-0101 or by searching our online physician directory.

View Doctors

Set Your Location

Setting your location helps us to show you nearby providers and locations based on your healthcare needs.