Were you taking fresh or dried,how much how often?Of all the stressers in life that can interfere with physical performance and the satisfaction of release.Grass juice is the only factor you came up with?I use grass juice more as a medicinal and not as a supplament.I have found no negative effects from consuming grass juice outside of palatability of the juice itself.Brian Clement of the Hippocrates institute of florida uses grass juice regularaly,you should send him an email and ask if this effect has been observed in the healing institutes.They would have more raw data on this subject matter and take this issue out of the silly state.May you be blessed with vibrant health in all areas of your life.Jeff