Bt Pharma Good Night 15 Effervescent Sachets Provides gentle and relaxing sleep support. 5 mg of Melatonin provide gentle and relaxing sleep support, GABA and L-Theanine relieve stress and support relaxation and mood, while Magnesium Citrate provide excellent addition to your bedtime routine. -promots otimal sleep -help to reduce th time taken to fall asleep -contributes to support the normal functioning of the nervous system -contributes to support the normal psychological function -reduction of tiredness and fatigue.