Yes and complicated: 1. It is OK to use endura mass gainer, it's a variant of the many different weight gainers available. 2 Building muscle comes from having a proper diet that allows for a a (+) nitrogen balance, hence the need for increased protein(source of nitrogen), stimulating muscle hypertrophy(from exercise) and making sure you have an overall net caloric balance(taking in more than your burn).
Answered 10/23/2015
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