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The Optimum Nutrition Gold Standard Pro Gainer from Optimum Nutrition is engineered to deliver results you can feel.
If gaining weight has always been a challenge, this mass gainer could be your ally.
Optimum Nutrition's mass gainer provides 60g protein and 650 calories per serving for serious weight gain.
Informed Sport certified, meaning every batch is tested for banned substances and purity.
Formulated to help sustain energy levels throughout your day or workout.
Uses animal-derived protein sources for a complete amino acid profile.
A premium-tier product for those willing to invest in top-shelf formulations.
Typically ranges from $98–$113 — a competitive price point for the US market.
A well-rounded offering from Optimum Nutrition that checks the right boxes for most users.
Track how the price has changed over the last 90 days on Amazon.com.
The brand behind this product — their story and what they stand for.
Trusted American sports nutrition brand since 1986. Gold Standard Whey is the world's best-selling protein powder, backed by decades of quality manufacturing.
Understand which fitness goals this product is best suited for.
Energy & Performance
Designed to fuel intense workouts and sustain energy levels throughout your training session.
Muscle Gain
Supports muscle growth and recovery when combined with resistance training and a protein-rich diet.
A quick look at pricing, tier, and how it stacks up against the category average.
Step-by-step usage instructions so you get the most out of every serving.
Mix 1–2 scoops with 300–400ml of milk for a calorie-dense shake.
Consume between meals or post-workout to hit your caloric surplus.
Start with 1 scoop to assess tolerance before moving to the full serving.
Track your total daily calories. A mass gainer works best when it fills a genuine calorie gap — not as a meal replacement.
See how this product compares to similar options in its category.
| This Product | Jadee | Jadee | bixa BOTANICAL | |
|---|---|---|---|---|
| Price | $144.99 | $20.80 | $20.90 | $24.99 |
| Per Serving | - | - | - | - |
| Servings | — | — | — | — |
| Lab Tested | ✓ | ✗ | ✗ | ✗ |
| Rating | 4.6 ★ | 4.2 ★ | 4.0 ★ | 4.2 ★ |
Common questions about this product — answered clearly and honestly.
This product is Non-Veg. It may contain animal-derived ingredients — check the label for specifics.
Yes, this product has been lab tested by Informed Sport. Third-party lab testing verifies that the product contains what the label claims, giving you confidence in its quality and purity.
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