Muscle Milk Pro Series Gainer Protein Powder Vanilla Creme vs Optimum Nutrition Serious Mass Weight Gainer (Chocolate Peanut Butter) 6 lb

Overall winner: Optimum Nutrition Serious Mass Weight Gainer (Chocolate Peanut Butter) 6 lb

Key Differences

Optimum Nutrition Mass Gainer (A) delivers far more protein (50 g) and carbohydrates (250 g) per 2-scoop serving, making it a true calorie-dense mass gainer for serious bulk. Muscle Milk Pro Series Gainer (B) offers strong protein and calories with reportedly better mixability and a smaller listed price tier, though it may require multiple scoops per serving and has some inconsistency notes about per-scoop protein math

Muscle Milk Pro Series Gainer Protein Powder Vanilla Creme

Muscle Milk Pro Series Gainer Protein Powder Vanilla Creme

Muscle Milk • ★ 4.1/5 • Mid-Range

Muscle Milk Pro Series Gainer protein powder with 32g protein, 109g carbs, and 650 calories per serving. Customers note strong weight gain results and good mixability

Pros

  • high protein per serving
  • high calories per serving
  • easy mixability
  • popular flavor vanilla creme

Cons

  • serving size discrepancy noted by customers
  • some customers report 4 scoops per serving
  • lactose-free claim mentioned by customer but not official
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Optimum Nutrition Serious Mass Weight Gainer (Chocolate Peanut Butter) 6 lb

Optimum Nutrition Serious Mass Weight Gainer (Chocolate Peanut Butter) 6 lb

Optimum Nutrition • ★ 4.3/5 • Mid-Range

Weight gainer powder with high calories, protein, and carbs plus vitamins and minerals for immune support. Customers note effective weight gain and good taste; mixability varies

Pros

  • high-calorie weight gainer
  • protein and carbohydrate per serving
  • includes vitamins and minerals for immune support
  • versatile—blend with fruits

Cons

  • large serving size per serving
  • mixed reviews on mixability
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Head-to-Head

CriteriaWinner
Price Muscle Milk
Durability Optimum Nutrition
Versatility Optimum Nutrition
User Reviews Optimum Nutrition