- STENGTH, ENDURANCE & REDUCED FATIGUE*
- INCREASED PERFORMANCE*
- MICRO-BATCH QUALITY*
- 100 SERVINGS
$300.00




| Flavour |
Chocolate Milk, Peanut Butter Bits, Vanilla Ice Cream |
|---|
OPTIMUM NUTRITION Serious Mass – Maximum Calorie & Protein Support
Fuel your muscle building and weight gain goals with Serious Mass, the highest-calorie weight gain formula from OPTIMUM NUTRITION. Each serving delivers an impressive 1250-1260 calories, 50g of protein, 250-253g of carbohydrates, and 5g of creatine monohydrate to support intense workouts and recovery.
Formulated with fast-digesting whey protein concentrate from milk, this powerful shake provides the essential macros for athletes aiming to maximize performance and muscle growth. 19 vitamins and minerals are included to support your overall nutrition, plus 8g of naturally occurring glutamine per serving to aid recovery.
This value bundle contains two 12lb tubs, and you can choose from five delicious flavors to keep your routine flavorful and exciting.
✔ Supports Muscle Building & Weight Gain
✔ 1250-1260 Calories & 50g Protein per Serving
✔ 250-253g Carbs & 5g Creatine per Serving
✔ Contains 19 Vitamins & Minerals
✔ 8 Servings
✔ Delicious Flavors for a Tasty Routine
✔ Trusted by Elite Strength Athletes Worldwide
OPTIMUM NUTRITION Serious Mass: The ultimate formula for those who need serious muscle support!
Brand: Optimum Nutrition
Flavor: Chocolate Bliss
Servings per Container: 24
Item Weight: 1.64 Pounds (~0.745 kg)
Protein per Serving: 25 grams of ultra‑filtered whey protein isolate
Key Features:
25g of high‑quality whey protein isolate per scoop to support muscle growth and recovery
5.5g naturally occurring BCAAs in every serving
Very low in carbohydrates (≈ 1g) and minimal fat (≈ 0.5g) per serving
Ultra‑filtered & partially hydrolyzed for rapid absorption
Gluten‑free and tested for banned substances
Smooth, premium chocolate flavor with easy mixing
Suggested Use:
Mix one scoop into 6‑8 oz of cold water, milk, or your preferred beverage. Best taken post‑workout or anytime you need a high‑protein, low‑carb boost.
Brand: Optimum Nutrition
Flavor: Vanilla Custard
Servings per Container: ~14 (165 g per serving)
Item Weight: 5.09 Pounds (~2.31 kg)
Protein per Serving: 60 grams of high‑quality protein
Key Features:
Delivers 650 calories per serving to support calorie and mass gain goals
Approximately 80‑82 grams of carbohydrates per serving to refill energy stores
Less than 8 grams of sugar per serving
Features a protein blend including whey isolate, concentrate, calcium caseinate, and hydrolyzed whey proteins
Includes 20 vitamins & minerals for overall nutritional support
Suggested Use:
Blend one large scoop (≈ 165 g) of Pro Gainer with about 16 fl oz (≈ 475 ml) of water, milk, or your favorite beverage. Use post‑workout or as a high‑protein meal between meals to help meet your caloric and protein needs.

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