HelloI am 46 years old and I play sports. I am...

Dear Customer
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should you be worried about your liver function test results :

you seems taking care of your body in really healthy way , you test results are within normal range , keep on tracking your health and being healthy 
- we will mention some basic advices about your medical condition , please follow it 

what are the normal ranges of ALT & AST :

ALT normal range : 10 - 57 
AST normal range : 10 -40

general advices about your medical condition :

1. stick to health diet 
2. if you protien intake is high , make sure you drink plenty of fluids 
3. sleep well and regulate your sleeping pattern 
4. avoid stress and anxeity 
5. try not to take any weight gaining products and stick to natural sources , and if so , pay attention to drink more water and stick to a mild course 
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Kind Regards