What is the best way to stimulate the leydig cells to produce more testosterone ?
make a similar claim for OTC.
Read the PP post on PCT for the heavy duty route. Unless you are doing an insanely long cycle I'd live subq approaches alone - just my opinion.
check into Blue Up as well, its a great value in the category
As mentioned above all 3 are good choices all have great reviews around them look into them DTH is good aswell but examine the ingredient profiles and what not, and figure out what works best for you.