Timing depends on your goal. For general stress/recovery support, consistent daily use may be chosen. If sleep/recovery is the main target, evening use can make more sense. Do not expect a stimulant-like “pre-workout” effect; it is not acute caffeine. Some people may feel drowsy, so pre-workout timing may be a poor fit. Test tolerance away from critical training sessions first. For athletes, product quality and contamination risk are also important.