The Biosline Vitacalm Sublingual Melatonin is a specialized sleep supplement formulated for effective use. This product features a dual-action release system, combining fast release and retard mechanisms to support the natural sleep-wake cycle. This formulation is designed for individuals seeking support for restful sleep patterns. The sublingual delivery method allows for rapid absorption, working quickly to aid in falling asleep, while the retard component assists in maintaining sleep throughout the night.