Optimum Serious Mass vs BSN True Mass

Quick Summary

🏆 Optimum Nutrition Serious Mass and BSN True Mass are two of the most popular high-calorie mass gainers globally.
🔥 Serious Mass delivers more total calories per serve and is ideal for hard gainers with fast metabolisms.
💪 True Mass provides a more balanced macronutrient profile and higher protein density per 100g.
⚡ Serious Mass includes bonus support ingredients like creatine, glutamine, inositol, and a wide vitamin-mineral complex.
🧬 True Mass features 8 protein sources and added enzymes for improved digestion and absorption.
😋 Both products taste excellent and mix well, with True Mass offering one additional flavour.
💰 Serious Mass is typically more cost-effective per gram due to its carb-dominant formula.
🥇 Overall, Optimum Nutrition Serious Mass is the superior option for those seeking aggressive calorie support and value.

Serious Mass vs True Mass Ingredients

Optimum Nutrition Serious Mass and BSN True Mass are top-tier weight gainers but use different ingredient strategies to support size and recovery.

Carbohydrates: Serious Mass leads with a massive 252g of carbohydrates per serve, primarily from maltodextrin, making it ideal for fast metabolism types who struggle to eat enough.

True Mass includes 76g of carbohydrates, combining maltodextrin with lower-GI fibre ingredients like polydextrose.

Protein Blend: Serious Mass delivers 50g of protein per serve from 4 key sources, while True Mass offers 46g per serve from 8 different proteins and includes added BCAAs.

Fats: Serious Mass contains 4.5g of fat, with a leaner fat profile. True Mass has 16g of fat, including MCTs and sunflower oil, providing calorie density and satiety.

Extra Ingredients: Serious Mass is enriched with 3g creatine, glutamine, glutamine peptides, inositol, choline, and a robust vitamin and mineral matrix. True Mass focuses on digestive enzymes (papain and bromelain) and a comprehensive blend of micronutrients.

Winner – Optimum Nutrition Serious Mass 🥇: Serious Mass stands out with its additional performance ingredients and higher total carbohydrate load for fueling intense training and mass building.

Serious Mass vs True Mass Dosing

To compare accurately, we look at values per 100g:

Nutrient	Serious Mass (per 100g)	True Mass (per 100g)
Calories	372 kcal	426 kcal
Protein	15g	31g
Carbohydrates	75g	51g
Fat	1.3g	11g

Winner – BSN True Mass 💪: True Mass is more calorie-dense and protein-rich per 100g, with a better-balanced macro profile for users focusing on lean mass.

Serious Mass vs True Mass Effectiveness

Serious Mass is purpose-built for those needing high-calorie support, delivering 1250 calories per serve with added creatine, glutamine, and inositol—all supporting size, performance, and recovery. Its high-carb profile is ideal for hard gainers looking to build mass quickly.

True Mass supplies 630 calories per serve and focuses on a leaner macro blend with better protein and fat ratios, making it effective for clean bulking.

Interested in more creatine support? Explore our full range of creatine supplements.

Winner – Optimum Nutrition Serious Mass 🏋️‍♂️: While True Mass delivers balance, Serious Mass is more effective for those needing aggressive calorie loading and fast weight gain, especially when paired with resistance training.

Serious Mass vs True Mass Taste, Flavour & Mixability

Optimum Nutrition offers Serious Mass in Chocolate, Vanilla, Strawberry, and Banana, while BSN adds a fifth flavour: Cookies & Cream.

Both products mix well, even in large servings. Serious Mass is slightly lighter in texture, while True Mass is creamier due to added gums and sunflower powder.

Winner – Tie 🤝: Both options deliver smooth mixability and enjoyable flavour. Preference may vary based on consistency and taste profile.

Serious Mass vs True Mass Price & Value

While prices may vary, Serious Mass typically offers better value per gram, owing to its maltodextrin-heavy design. Carbohydrates are a more cost-effective calorie source compared to protein or fats.

True Mass justifies its higher cost with quality ingredients and protein density, but for raw calorie delivery and cost efficiency, Serious Mass holds an edge.

Winner – Optimum Nutrition Serious Mass 💸: Best suited for those who need maximum calories per dollar, Serious Mass delivers strong nutritional value at scale.

Serious Mass vs True Mass Winner

Both products are excellent in their own right, but Optimum Nutrition Serious Mass rises to the top for users needing:

🔼 Higher total calorie intake
🍚 More carbohydrates to fuel hard training
🧪 Bonus ingredients like creatine and glutamine
🧃 Greater serve size flexibility for serious bulking

While BSN True Mass is ideal for users seeking lean mass with high protein and fats, Serious Mass offers unmatched calorie density and ingredient support for accelerated weight gain.

Overall Winner – Optimum Nutrition Serious Mass 🥇

To explore more options for high-calorie gainers, visit our Carbohydrate Supplements range. For a deeper dive into this product, read our detailed Optimum Serious Mass Review.