Am just start workout in gym so when I can start...

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Am just start workout in gym so when I can start protein powder ?
its depends on many factors such as your current weight/ height status , how is your training , and what is the goal of using protients , but usually its recommanded to avoid taking suppliments before 2 months of steady workout 
Does protiens powder have side effects ?
of course , they have side effects and possible risks if were taking without doctor or trainer consultation and supervising such as :
1. liver issues 
2. kidney isseus 
3. upset stomach and uncomfortable gastric tract
General advices :
1. you dont need portients shakes if you have any liver or kidney chronic disease 
2. its better to consult your doctor before start taking any supplimnets 
3. drink plenty of water while you are on protiens 
4. protiens cant be used instead of meals and cant be ignored 
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Kind Regards