YEAH I HAD A HEADACHE ONCE THE INTIRE TIME ON IT, AND I NEVER GET HEADACHES SO I THOUGHT MAYBE IT WAS THE IGF, MAYBE NOT, I KNOW FOR SURE IT MADE ME SLEEPY SOMETIMES AND SOMETIMES IN A GOOD MOOD,LIKE A WELL BEING FEELING, STRANGE, I ALSO KNOW PUMPS WERE SICK AS WAS MY 3D APPEARANCE, REAL CROWD PLEASER,LOL