Melatonin

Melatonin is a sleep-related hormone that anticipates the onset of darkness.

Notable studies

 * 2016, Effect of melatonin supplementation on plasma lipid hydroperoxides, homocysteine concentration and chronic fatigue syndrome in multiple sclerosis patients treated with interferons-beta and mitoxantrone.
 * 1996, Dissociation of body-temperature and melatonin secretion circadian rhythms in patients with chronic fatigue syndrome

Learn more

 * Wikipedia - Melatonin