Rule 1 Proteins brings the Rule 1 Proteins Mass Gainer - High-Calorie Weight Gain Formula to your fitness arsenal — here's what sets it apart.
A calorie-dense formula built to support hard gainers and bulking phases.
Rule 1 Proteins' mass gainer provides 40g protein and 220 calories per serving for serious weight gain.
Carries the Informed Choice certification — independently tested to ensure what's on the label is what's in the tub.
Can support fat-loss phases by helping maintain adequate protein levels.
Suitable for vegetarians, so you can supplement confidently on a plant-inclusive diet.
Strikes a good balance between quality ingredients and reasonable pricing.
Available at $33.00 — a competitive price point for the US market.
If Rule 1 Proteins is a brand you trust, this product reinforces that confidence.
The brand behind this product — their story and what they stand for.
US-based supplement brand offering mass gainer and weight gain products.
Understand which fitness goals this product is best suited for.
Fat Loss
Helps maintain lean muscle during a caloric deficit. Pair with a structured workout and nutrition plan.
Muscle Gain
Supports muscle growth and recovery when combined with resistance training and a protein-rich diet.
Track how the price has changed over the last 90 days on Amazon.com.
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 | Dymatize | Animal | Muscle Milk | |
|---|---|---|---|---|
| Price | $33.00 | $39.98 | $43.95 | $44.19 |
| Per Serving | - | - | - | - |
| Servings | — | — | — | — |
| Lab Tested | ✓ | ✓ | ✓ | ✓ |
| Rating | 4.4 ★ | 4.5 ★ | 4.6 ★ | 4.5 ★ |
Common questions about this product — answered clearly and honestly.
Yes, this product is vegetarian-friendly. It does not contain any non-vegetarian ingredients.
Yes, this product has been lab tested by Informed Choice. Third-party lab testing verifies that the product contains what the label claims, giving you confidence in its quality and purity.
Dymatize
Dymatize Super Mass Gainer Protein Powder, Gourmet Vanilla, 52g Protein, 1g Creatine, 1280 Calories, 10.7g BCAAs, 245g Carbs, Contains Whey Protein Powder, Isolate, and Casein (8 Servings)
Animal
Animal M-Stak - Muscle Builder and Anabolic Mass Gainer Supplement for Bodybuilding - Lean Muscle Growth, Amino Complex and Pre Workout Energy, 21 Packs
Muscle Milk
Muscle Milk Gainer Protein Powder, Chocolate, 32g Protein, 5 Pound
RIVAL NUTRITION
RIVAL NUTRITION Clean Gainer Chocolate Fudge High-Protein Lean Gainer Powder I 5 Lb, 15 Servings I 580 Calories, 30g Protein, 101g Multi-Source Carbs Per Serving I Natural Flavors, Clean Ingredients
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