i'm 46 yrs old workout 4/5 days a week, and never had any libido probs. Noticed a change in my energy and libido and over all attitude since early summer maybe longger but thats as far as I can remember . Got blood test few weeks ago test came back @197.....so last week got my first injection, energy came back, but my libido went to hell, even worst. Called doc to see if this is norm he said wait it out. but seems like everyone else libido rocks right away...I understand takes time, just having hard time with even worst libido...????