REAL POWER. SERIOUS ENERGY. No man can be a pro bodybuilder if he doesn’t increase his body weight. Only a few gain weight without extra effort. For all the others who know how difficult is to increase your lean body weight there is an answer to their prayers: Serious Mass. It is designed for serious athletes.

Each serving gives you 1250 valuable calories, 50gr. high protein, with low glycemic index carbs, full your body with energy, power and muscle size.
With a unique mix of vitamins and minerals, creatine and glutamine is the SERIOUS supplement meal.

 X-TREME STORES  S.A. is the official representative of Optimum Nutrition in Greece, and this is something you can check by visiting the official ON’s site. Press here.