Cyto-Night is a powder which can be mixed in a small amount of water or juice at bedtime. It contains the key ingredients glycine, Montmorency cherry, magnesium and hops. - Montmorency cherry is a natural source of melatonin(the sleep hormone). - Glycine is an amino acid. Amino acids are compounds used by the body for a number of functions including to form proteins and neurotransmitters (brain chemicals) - Magnesium is a mineral that is a co-factor for over 300 enzymes in the body. It has many roles including contributing to the normal functioning of the nervous system and normal psychological function - Hops are also included in this supplement