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GGR Score: 3.975
Product Highlights
- High-calorie supplement formulated with a 1:5 protein to carbohydrate ratio
- Each serving contains 1,250 calories
- Each serving contains 50 grams of protein, 253 grams of carbohydrates, 4 grams of fat,
- Available in Chocolate, Chocolate Peanut Butter, Strawberry, and Vanilla
- Recommended to use 2 scoops per 24 ounces of fluid taken post-workout or in between meals
In-Depth Review
Optimum Nutrition Serious Mass Review (2026): Is This Popular Weight Gainer Worth the Hype?
Author: Destini Moody, RD, CSSD, LDIn this Optimum Nutrition Serious Mass review, a sports dietitian breaks down the pros and cons of one of the internet’s most popular weight gainers. Read the full review.
Pros & Cons
Pros
- Taste
- High carb to protein ratio
- Includes creatine monohydrate
- Low fat
- Users report it works quickly
Cons
- Does not mix well without a blender
- Contains sucralose
- 20 grams of sugar
Specs
| Serving information | 8 servings |
|---|---|
| Protein Per Serving | 50 g |
| Fat Per Serving | 5-6 g |
| Carbohydrates Per Serving | 251-253 g |
| Key ingredients | Maltodextrin\, protein blend (whey protein concentrate\, calcium caseinate\, egg white\, sweet whey)\, medium chain triglycerides\, lecithin\, sucralos |
| Available Flavors | Banana, Chocolate, Chocolate Peanut Butter, Strawberry, Vanilla |
| Nutritional highlights | 1\,250 calories\, 50 g protein\, 252-254 g carbohydrate\, >5 g fat |
| Third-Party Testing | None |
| Calories Per Serving | 1,250-1,260 |
| Flavors | Chocolate\, Chocolate Peanut Butter\, Strawberry\, and Vanilla |
Product Summary
If you do not mind artificial ingredients, Optimum Nutrition Serious Mass is a good-tasting weight gainer with an impressive 1:5 protein to carbohydrate ratio.
