i think you mean prohormones. all orals that are c17 alpha alkylated are very toxic to your liver and liver protectants is a must. there are oral anabolics out there that arent as hard on your liver as others. also you should always run a pct following any type of cycle to help restore natural test and keep most or all of your gains...

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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."