Melatonin (1 fl oz) by DesBio.

Melatonin is a hormone produced in the Pineal gland, which forms serotonin, the precursor of melatonin which, in turn, is the precursor of tryptophan. It governs our sleep cycles and regulates body rhythms to promote normal sleep. Excess blood levels of melatonin lead to a decrease in thyroid hormone levels. It is a neuroendocrine transducer that responds to light stimulation. Individuals with high levels of melatonin usually sleep longer and more soundly than those with lower levels. As age develops, less melatonin is produced by the body so sleep is usually shallower and of shorter duration.
INDICATIONS: For temporary relief of symptoms related to sleep disorders, Seasonal Affective Disorder, jet lag, and depression.