Eq, takes 4 to 5 weeks for me to see and feel it in the gym. It's a slow creeping drug. Gave me acne and oily skin. But made me lean as fuck. Every 3 weeks I increased my dosage buy 100 mg staring off at 200 mg. I ran it for 16 weeks ending up at 600 mg. Your receptor sites in your body builds a tolerance to pretty much anything really. If you increase slowly like this the hormone will constantly be building up in your system never getting caught up in tolerance. Also buy the time you inject another 200 mg at week 2 your 1st week injection is still building up in in your blood stream . but testosterone doesn't really build a tolerance, if you inject 500 mg for 3 months and take month break then inject another 500 mg it will still work at 500. That's the magic of test. You don't need to raise the dose like that. I did this to experiment on my self and you would think this caused me side effects but honestly it didn't, I an my test at 500 constant that cycle and gained 23 pounds keeping.