clomid and nolvadex are both anti-estrogens. meaning they help block it when on cycle and help restore natural test and get body functioning right after a cycle. HCG is also very smart to run with clomid and/or nolvadex after a cycle to help kickstart your testis to start producing again...

__________________
age-20
6'0" 190lbs
bench press-245x2
a2g squats-455x1-9/7/06
deadlift-475x1-9/5/06

"An ounce of prevention beats a pound of cure."