Natural Vitality CALMful Sleep is a relaxing nighttime drink mix formulated to support relaxation and restful sleep. It combines magnesium with magnesium glycinate, L-theanine (Suntheanine®), GABA, and melatonin to help promote a calm, relaxed state as part of your bedtime routine. Naturally flavored with organic wildberry flavor and sweetened with organic stevia, this fizzy drink mix can be enjoyed with warm or cold water before bed.