Youtheory sleep nighttime powder contains several nutrients designed to help you fall asleep naturally so you get a better night's rest. Each packet has a micro-dosage of melatonin to replicate the amount produced by the body at night. The amino acids work with your brain to alleviate symptoms of sleep deprivation, while magnesium calms the mind. The powder has a tasty lemon-lime flavor to mix with water or juice. This package contains 21 individual packets which contain 5.43 g each.