Does the supplement have effect.Nervous side on acne and sexual problems.Can it cause?

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any research on the label. There are a lot of crap in there (so do MuscleTech), and it's not a good deal - you do not get much protein for your money.

However, none of these ingredients makes me afraid.

can you tell me what it did for you and if i should take it

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I have never taken muscletech products. But I love Optimum Whey during the day and Optimum Casein before bed and love them.

My big brother using this product about 2-3 weeks, twice a day .. he's some discomforts in his stomach last days, it seems like a burning stomach, painful.. is this a side effect of this product? or this is something else?

He's 38 years

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could very well be the product..... as it might be too intense for his body...
or he could be taking something else that is bothering him..

tell him to get off it for 2 - 3 days and if he sees a difference then he knows its the