Serious Mass (12 lb)

[Ari Gold]

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[tcslick]

5/5

You can't beat the value of Optimum Nutrition products. They are good quality and reasonably priced. I use this product almost every bulk. I always put on 5 or so pounds a month while on it.

 

[luckwithit]

5/5

I've used ON's Serious Mass for two bulking cycles and was pleased both times. I packed on 6lbs through the first bulk and 8 on the second. The chocolate flavor tastes great, I bought the same flavor for both rounds in the 12lb bag they have.
Looking forward to the next bulking phase and ordering this product again!