The results of the present meta- analysis support that melatonin supplementation could be effective on ameliorating of inflammatory mediators
Inflammatory processes are involved in chronic diseases .
It has been suggested that melatonin reduces inflammation by its radical scavenging properties ; however , the results of the previous studies are inconclusive .
The objective of the present meta- analysis is to determine the direction and magnitude of melatonin supplementation effect on inflammatory biomarkers .
Randomized, double-blind clinical trial, controlled with placebo, of the toxicology of chronic melatonin treatment.
The objective of the present study was to assess the toxicology of melatonin ( 10 mg ) , administered for 28 days to 40 volunteers r and omly assigned to groups receiving either melatonin ( N = 30 ) or placebo  ( N = 10 ) in a double-blind fashion . The following measurements were performed : polysomnography ( PSG ) , laboratory examinations , including complete blood count , urinalysis , sodium , potassium and calcium levels , total protein levels , albumin , blood glucose , triglycerides , total cholesterol , high-density lipoprotein ( HDL ) , low-density lipoprotein ( LDL ) , and very low-density lipoprotein ( VLDL ) , urea , creatinine , uric acid , glutamic-oxalacetic transaminase ( GOT ) , glutamic-pyruvate transaminase ( GPT ) , bilirubin , alkaline phosphatase , gama-glutamic transaminase ( GGT ) , T3 , T4 , TSH , LH/FSH , cortisol , and melatonin serum concentrations . In addition , the Epworth Somnolence Scale ( ESS ) and a sleep diary ( SD ) were also applied to the volunteers 1 wk before each PSG . In addition , the volunteers were asked about possible side effects ( SE ) that appeared during the treatment . The study was carried out according to the following timetable : Visit 0 , filling out the term of consent and inclusion criteria ; Visit 1 , PSG , laboratory examinations , ESS , SD ,  melatonin serum concentrations ; Visit 2 , SD ,  melatonin serum concentrations , SE ; Visit 3 ,  melatonin serum concentrations , PSG , ESS , SE ; Visit 4 , laboratory examinations , SE , melatonin serum concentrations , SD ; and Visit 5 , PSG , ESS , SE . Analysis of the PSG showed a statistically significant reduction of stage 1 of sleep in the melatonin group . No other differences between the placebo and melatonin groups were obtained . In the present study we did not observe , according to the parameters analyzed , any toxicological effect that might compromise the use of melatonin at a dose of 10 mg for the period of time utilized in this study
The results of the present meta- analysis support that melatonin supplementation could be effective on ameliorating of inflammatory mediators
Inflammatory processes are involved in chronic diseases .
It has been suggested that melatonin reduces inflammation by its radical scavenging properties ; however , the results of the previous studies are inconclusive .
The objective of the present meta- analysis is to determine the direction and magnitude of melatonin supplementation effect on inflammatory biomarkers .