I plan on using one bottle. I have had three blood tests and all show me to have low testosterone (under 250). I have never used any steroids and my low test is simply attributed to getting old (35 years old). I thought that your product might help me. I used the original Dermacrine (3-4 bottles)and it did make a difference. I don't have the bloodwork during those periods to prove that my testosterone increased but I definitely felt a difference. The second day I used Dermacrine I had erections one after the other for no apparent reason. I felt like I was in Junior High School again.