To start off im extremley caffeine tolerant .... and also im not using any pre workout just a 100 mg caffeine pill before workouts. Started at 60 mcg than 80 mcg today I did 120 mcg and still didnt feel much .... my energy levels are good though.... could it be , because ive done a few clen cycles before im more tolerant too it? Body temperature was a bit elevated last night during sleep and during my workout today. Me and my buddy got it form the same source and hes having all the sides but im not so Im pretty confident its not fake.