Marketing claims: "Creatine HCL absorbs better," "Buffered creatine is superior." Reality: Zero evidence that any creatine form outperforms plain monohydrate. Monohydrate has 500+ studies; alternatives have almost none. "Bloating" claims are overblown — water retention is intramuscular (makes muscles look fuller, not fat). Creatine is one of the few supplements that actually works as advertised.
Reviews / ON Serious Mass
ON Serious Mass
Optimum Nutrition•See all Optimum Nutrition products →
See full ranking: Best Protein Supplements in India (2026) →

ON Serious Mass offers a well-formulated supplement with detailed transparency but lacks effective dosing for key ingredients and presents poor value for money. At ₹287.25 per serving, it is significantly pricier than category norms, making it less attractive to budget-conscious buyers.
MRP
₹1239
Based on MRP. Actual price may be lower.
Cost/Serving
₹287.25
Based on MRP. Actual price may be lower.
Servings
4

ON Serious Mass from Optimum Nutrition scores a perfect 10 for its formula, using well-known ingredients like creatine monohydrate, magnesium, and zinc. However, the product's high price at ₹287.25 per serving considerably exceeds the category average, making it less budget-friendly for the typical consumer.
This protein powder is designed for those seeking substantial mass gain benefits but comes at a premium cost. It may not be the best choice for individuals focused on value, as the high per-serving price does not align with the effective dosing of its ingredients.
ON Serious Mass contains key ingredients like creatine monohydrate, magnesium, and zinc. These ingredients are peer-recognized for their role in muscle mass and recovery, but the presence of other protein sources typically expected in mass gain products is lacking. The inclusion of these ingredients aligns well with the category, but there might be a need for additional protein sources to justify the high price point.
The formula's creatine monohydrate is dosed at 0.8982 g, which is significantly below the clinically recommended dose of 3-5 g for performance benefits. Likewise, magnesium and zinc are present in limited amounts at 29.9401 mg and 5.988 mg, respectively, which do not meet the higher requirements often suggested for athletic performance and recovery.
At ₹287.25 per serving, ON Serious Mass is 153% more expensive than the average price per serving in the protein category, which is ₹113.76. Although it presents a solid formula, the underdosing makes it a poor value for money, especially for budget-conscious consumers.
ON Serious Mass excels in transparency, fully disclosing the doses of individual ingredients without resorting to proprietary blends. There are no specific claims of third-party testing, but the detailed ingredient list provides clarity for consumers.
✓ Buy if
- •You prioritize a well-researched formula with transparent labeling.
- •You are not constrained by budget and seek a premium product.
- •You specifically want creatine, magnesium, and zinc in your mass gainer.
✗ Skip if
- •You are looking for a cost-effective mass gainer.
- •You need clinically dosed ingredients.
- •You want a protein powder with a broader spectrum of protein sources.
ON Serious Mass presents a transparent yet costly choice for those focusing on selective nutrient intake. For those seeking a better value proposition, considering alternative products with more complete and cost-effective formulations may be wise.
How It Compares
ON Serious Mass scores 5.9, placing it 0.5 points under the category average of 6.4. It is significantly more expensive at ₹287.25 per serving compared to its top competitor, Nutrabay Gold Mass Gainer, at ₹99.90. Despite this, ON Serious Mass excels with a formula score of 10.0, the highest among competitors and 4.2 points higher than Nutrabay's score of 5.0. It contains ingredients like Creatine Monohydrate, which is rare in only 6% of products in this category.
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| Product | Score | Cost/Serving | Key Advantage | Key Weakness |
|---|---|---|---|---|
| ON Serious Mass (this product) | 5.9/10 | ₹287.25 | Exceptional formula score (10.0) | High cost per serving |
| Nutrabay Gold Mass Gainer | 6.4/10 | ₹99.90 | Low cost per serving | Lower formula score |
| MuscleBlaze Mass Gainer XXL | 6.1/10 | ₹109.95 | Balanced sub-scores | Average formula score |
| OZiva Bioactive Plant Protein (Chocolate) 500g | 7.5/10 | ₹37.44 | Highest overall score | Lower formula score |
Ingredients
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| Ingredient | Dose per serving |
|---|---|
| Creatine Monohydrate | 0.8982 g |
| Zinc | 5.988 mg |
| Magnesium | 29.9401 mg |
Learn more about these ingredients +Ingredient Deep Dive −
Marketing claims: "Natural calm," "Better sleep guaranteed." Reality: Magnesium helps sleep primarily in deficient individuals. If you are not deficient, effects are modest. Magnesium oxide (the cheapest form) has poor absorption (~4%) — glycinate, citrate, and threonate absorb much better (20-30%).
Marketing claims: "Immune booster," "Testosterone support." Reality: Zinc only boosts immunity or testosterone if you are deficient. Excess zinc (>40mg long-term) can cause copper deficiency and actually suppress immunity. Most multivitamins provide adequate zinc — standalone supplements often provide excessive doses.
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