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Current Evidence for the Benefits of Melatonin
Summarized from the Mayo Clinic.

Alzheimer's Disease (sleep disorders)
Extent of Studies: Limited       Level of Evidence: Unclear
Results: Unclear if beneficial

Antioxidant (free radical scavenging)
Extent of Studies: Over 100 laboratory and animal       Level of Evidence: Unclear
Results: Suggest the prevention or treatment of conditions associated with oxidative damage

Attention Deficit Hyperactivity Disorder (ADHD)
Extent of Studies: Limited       Level of Evidence: Unclear
Results: Unclear

Benzodiazepine Tapering
Extent of Studies: Small       Level of Evidence: Unclear
Results: Promising

Bipolar Disorder (sleep disturbances)
Extent of Studies: Limited       Level of Evidence: Unclear
Results: Unclear

Cancer Treatment
Extent of Studies: Several       Level of Evidence: Unclear
Results: Mixed, promising

Chemotherapy Side Effects
Extent of Studies: Several       Level of Evidence: Unclear
Results: Promising early results include reductions in nerve injury, mouth sores, wasting, and platelet count drops, heart and lung damage.

Circadian Rhythm Entraining (in blind persons)
Extent of Studies: Multiple       Level of Evidence: Unclear
Results: Suggest that melatonin, administered in the evening, may correct circadian rhythm.

Delayed Sleep Phase Syndrome (DSPS)
Extent of Studies: Several, Small       Level of Evidence: Good
Results: Promising.

Depression (sleep disturbances)
Extent of Studies: Limited       Level of Evidence: Unclear
Results: Limited

Glaucoma
Extent of Studies: Limited       Level of Evidence: Unclear
Results: Preliminary evidence that melatonin may actually decrease intraocular pressure in the eye

Headache Prevention
Extent of Studies: Several, small       Level of Evidence: Unclear
Results: Suggest possible benefits in all three types of headache

High Blood Pressure (hypertension)
Extent of Studies: Several, mostly small       Level of Evidence: Unclear
Results: Small reductions in diastolic and systolic blood pressure

HIV / AIDS
Extent of Studies: Lacking       Level of Evidence: Unclear
Results: Melatonin should not be used in place of more proven therapies, and patients with HIV/AIDS are advised to be treated under the supervision of a medical doctor.'

Insomnia (of unknown origin in the non-elderly)
Extent of Studies: Several, small       Level of Evidence: Unclear
Results: Inconsistent.

Insomnia in the Elderly
Extent of Studies: Several       Level of Evidence: Good
Results: Suggest short-term benefits.

Jet Lag
Extent of Studies: Several       Level of Evidence: Strong
Results: Strong evidence. Suggest benefits of melatonin in up to half of people taking melatonin.

Parkinson's Disease
Extent of Studies: Very limited       Level of Evidence: Unclear
Results: Unclear

Periodic Limb Movement Disorder
Extent of Studies: Very limited       Level of Evidence: Unclear
Results: Unclear

Preoperative Sedation / Anxiolysis
Extent of Studies: Small number       Level of Evidence: Unclear
Results: Promising

REM Sleep Behavior Disorder
Extent of Studies: Limited case reports       Level of Evidence: Unclear
Results: Some benefits

Rett Syndrome (female children)
Extent of Studies: Limited       Level of Evidence: Unclear
Results: Unclear

Schizophrenia (sleep disorders)
Extent of Studies: Limited       Level of Evidence: Unclear
Results: Unclear

Seasonal Affective Disorder (SAD)
Extent of Studies: Several, small       Level of Evidence: Unclear
Results: Not well reported

Seizure Disorder (children)
Extent of Studies: Several case studies, limited animal research       Level of Evidence: Unclear
Results: Controversial, suggests possible anti-seizure effects. However, melatonin may actually lower seizure threshold and increase the risk of seizures.

Sleep Disturbances Due to Pineal Region Brain Damage
Extent of Studies: Several       Level of Evidence: Unclear
Results: Improvements in sleep patterns in young people. Consideration of melatonin in such patients should be under the direction of a qualified healthcare provider.

Sleep Disturbances in Children with Neuro-Psychiatric Disorders
Extent of Studies: Multiple       Level of Evidence: Good
Results: Reduced time to fall asleep, increased sleep duration.

Sleep Enhancement in Healthy People
Extent of Studies: Multiple       Level of Evidence: Good
Results: Suggest decrease the time it takes to fall asleep, increases the feeling of 'sleepiness,' and may increase the duration of sleep.

Sleep in Asthma
Extent of Studies: Preliminary       Level of Evidence: Unclear
Results: Possible improvements

Smoking Cessation
Extent of Studies: Small       Level of Evidence: Unclear
Results: Promising in reducing symptoms associated with smoking cessation, such as anxiousness, restlessness, irritability, and cigarette craving.

Stroke
Extent of Studies: (none listed)       Level of Evidence: Unclear
Results: Unclear. Possible reduction of neurological damage and melatonin levels.

Tardive Dyskinesia
Extent of Studies: Limited, small       Level of Evidence: Unclear
Results: Mixed

Thrombocytopenia (low platelets)
Extent of Studies: Some cases studies       Level of Evidence: Unclear
Results: Unclear

Ultraviolet Light Skin Damage Protection
Extent of Studies: Several, small       Level of Evidence: Unclear
Results: Reductions in erythema (skin redness)

Work Shift Sleep Disorder
Extent of Studies: Several       Level of Evidence: Unclear
Results: Mixed



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The content presented in this website is for informational purposes only. Before taking this or any other health supplement or therapy, consult your healthcare professional. Even mild supplements can have varying effects on individuals, and can conflict with your existing medications and diet. See additional information.

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