Aspartate transferase; You will find that this enzyme works in the heart and the liver and its normal count is about 45. If you encounter higher levels it may indicate either alcohol or viral hepatitis, but it could also indicate the breakdown of skeletal muscle tissues, which also happens as the result of heavy weight training.

Alaine Transferase; Found in the liver, a normal count is 45 and it is also higher in males, but the levels of this enzyme will increase under the affects of alcohol or through any virus present in the body and other diseases such as Sarcoidosis can also increase the level.

Alkaline Phosphatase is one of the enzymes that is found in our liver and our bones and its average range can vary on whether our bones are growing or not, so it tends to increase as we get older. Body builders will only experience increased levels if they use growth hormone in their cycle and it is advisable to inform your GP, otherwise you might be diagnosed as having bone disease. The normal average range found present in a fully grown adult is between 30 and 95.

Creatine Phosphatase is my favourite as it is always elevated. In normal sedentary individuals high levels may indicate renal disease, muscle injury or acute injury. If your Doctors get bent over a high level of creatine remind him the muscle injury is probably due to the 600lb deadlift you did the day before! I also have elevated levels as I supplement with creatine monohydrate, so that's 's another reason for elevated levels. Normal rate is 225.

BUN (Blood Urea Nitrogen) levels is another good one as elevated levels (normal 9 - 24) can indicate a high protein intake or excessive protein breakdown (Duh! Remind the Doctor about the 3 - 4 whey protein or protein isolate powder preparations you take in a day). Now this is one where your Doctor needs to be reminded that as a heavy weight trainer you will be taking lots more protein than the normal or sedentary person.

There exists a 17-alpha-alkylated chemical attached to the majority of oral steroids, which stops the liver from destroying the active ingredients once it passes through. This will cause wear and tear, so if you have a tendency for liver problems you should avoid oral anabolics that have been treated with 17-apha-alkylated. If you should be in any doubt you should buy the Layman's Guides I and II to find a more liver friendly anabolic stack.