Nutricology, ZenMind Nighttime with P5P and 5-HTP, 60 Vegetarian CapsulesInnovative Nutrition With P5P and 5 HTP Hypoallergenic Dietary Supplement ZenMind Nighttime with P5P and 5 HTP ZenMind Nighttime includes the same amount of GABA and L Theanine as the best selling original formula ZenMind, augmented with vitamin B6 as P5P, and 5 HTP, the precursor to serotonin. The combination helps promote a relaxed state, and provides the necessary factors for the body to produce melatonin, supporting normal, health sleep.