Elevated Liver Enzymes

[Malgor21]

Hi,
My background : I am 21 years old ,not smoking not drinking alcohol at all.
I do exercise with weight lifting 5 days a week . In my weight-lifting program i include 2-3 times cardio as well (running ) . I am taking for 2 months a protein supplement IsoPure Zero Carb  (Nature's Best).
Before two weeks i did normal blood test . I did not train or take any supplement for 3 days .
Date 20 March 08
AST:244
ALT:156
Everything else normal ( all other liver enzymes)

I did have an Ultrasound diagnosis  and everything was ok
The same day i did blood test again with many other checks for liver diseases
and the results
27 March 08
AST:61
ALT:81
CPK:660
(CPK was high because i did intense training for 5 days)
All diseases were negative

Another thing is  that 2 days after my first blood check (20 March 08) i was feeling chills and as if i had fever
but for like 4 years i am exercising its hard to understand when i am ill since i recover really fast
Do you think the supplement was the problem?
How can this rapid decrease be explained? ( i will have blood test again in five days)

[Malgor21]

is there anything that can explaint he rapid decrease in 7 days?

[rasticle]

Your probably fine.  Almost anything, including exercise, cold meds, suppliments, eating, etc etc, can increase liver enzymes.  My alt and ast area always elevated (alt: 80s ast:60s) and they have never found anything wrong with my liver.  I have had everything done, including a liver biopsy, which is the gold standard liver health test.