BSN Syntha 6 help gain muscle or should do something else, I just bought online but I do not know what he does, he has not said in describing what she exacltly.

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Yes, it promotes muscle growth. It is a slow release and fast release proteins. Whey is a protein which is absorbed faster and milk proteins absorb slower.

The product feeds the muscle for about 6 hours. Good protein supplement.

I've just bought syntha 6 and wondering how good is it or should i use nitrotech or O.N 100% whey protein.

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i am not sure on sytha-6 but BSN does make high quality products. i personally use 100% in my stack and it works great