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A 24-year-old male asked:

Optimum nutrition's serious mass, does it have any side effects ? i am planning to start it on gym days..is it advisable? want to gain mass.

1 doctor answer1 doctor weighed in
Dr. Ed Friedlander
Pathology 45 years experience
Seems okay: It appears to be a whey-protein supplement with creatine, and thus safe. I'm glad you're pursuing a fitness goal like this, and that you are doing this rather than using anabolic steroids. My friends who lift often use a protein powder and/or creatine with good results; everyone i know who's tried steroids has been sorry.

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Last updated May 19, 2021

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