Why is Melatonin-free so important? It was never intended to be a sleep aid. It was designed to manipulate the circadian body clock and relieve the effects of jet lag. It was never intended for long-term use. Melatonin is synthetically derived and mimics the natural melatonin hormone produced by the pineal gland in the brain. People report experiencing the M- Effect (Melatonin Effect) which consists of unpleasant dreams and heavy morning grogginess. Dependencies are known to occur with long-term use. In contrast, Herbal-zzZs provides the best nightly sleep support you can experience. Its ingredients come directly from nature. This innovative and proprietary sleep formulation is designed to give a restful REM sleep without the M-Effect.