i have a couple bottles of clen 100mcg/1mgketo/mLthat im 4 weeks deep into. ive ramped up from 40 mcg to 200 per day and i was wondering why i dont get the shakes that i here about everyone getting. I was thinking my stuff could be fake but its a good source from what i hear from some of my friends who are more experienced then I. And when i cycled clen for two weeks last summer i ran up to 140 mcg with no shakes. Could my body have a natural tolerance to it? i no when i take caffeine it has no effect on me, btw the blood pressure is about 130/80 most days, which is higher then normal so i think the clen is real.