OstroVit - Histidine is an amino acid...
Pineal hormone regulates the rhythm of sleep-wakefulness, has a wide range of additional effects. Also known as the sleep hormone.
Swanson Melatonin contains melatonin, which helps control your sleep/wake cycle.
Swanson 5-HTP & Melatonin contains 5-HTP and melatonin, which regulates the sleep-wake cycle.