![serious mass whey protein](https://optimumnutritionsea.com/frontend/images/products/serious-mass_bottele.png)
Serious Mass MEANS SERIOUS CALORIES
To gain weight, you need to consume more calories than you expend. For many aspiring to hit their calorie goals and put on size, a highly active metabolism, weak appetite or on-the-go lifestyle can make it a real challenge to get enough calories from food alone.
suitable for those:
- Training longer and harder to gain more muscle
- Finding it difficult to consume enough calories through food alone
- Finding it challenging to gain weight regardless of your dietary intake
SERIOUS
MASS
at a glance
![serious mass whey protein](https://optimumnutritionsea.com/frontend/images/products/serious-mass_bottele_group.png)
![optimum nutrition weight gainer](https://optimumnutritionsea.com/frontend/images/backgrounds/SM-Info-EN.png)
![serious mass whey protein](https://optimumnutritionsea.com/frontend/images/backgrounds/SM_benefits_1.jpg)
SUPPORTS WEIGHT &
MUSCLE BUILDING
![optimum nutrition serious mass gainer powder](https://optimumnutritionsea.com/frontend/images/backgrounds/SM_benefits_2.jpg)
FUELS INTENSE WORKOUTS &
REPLENISHES GLYCOGEN STORES
![muscle building supplements](https://optimumnutritionsea.com/frontend/images/backgrounds/SM_benefits_3.jpg)