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#8 in Protein Powders Third-Party Tested

Optimum Nutrition Gold Standard Gainer

by Optimum Nutrition

"760 calories per serving with 55g protein — ON's moderate-calorie mass gainer with oat-based complex carbs and minimal sugar"

Amazon Rating
4.4/5
Reviews
8,600+
Price Range
$38-48
Servings
16 servings
Informed ChoiceGMP Certified
Our Editorial Rating
8.0
Very Good
FormPowder
SubcategoryMass Gainer (Moderate Calorie)
View on Amazon

Overview

Optimum Nutrition Gold Standard Gainer provides 760 calories, 55g protein (from whey isolate, whey concentrate, and casein), and 113g carbohydrates per 2-scoop serving. Unlike extreme mass gainers with 1000+ calories of maltodextrin, Gold Standard Gainer uses oat flour as the primary carb source for sustained energy without blood sugar spikes. The moderate calorie count makes it easier to control weight gain and minimize fat accumulation. ON's reputation for quality and taste makes this one of the best-tasting gainers available.

Key Ingredients

IngredientAmount
Protein (Whey + Casein)55 g
Carbohydrates (Oat-Based)113 g
Calories760
Sugar6 g

Pros & Cons

What We Like

  • 55g protein per serving
  • Oat-based carbs (not maltodextrin)
  • Only 6g sugar
  • 8,600+ reviews
  • ON quality and taste

What Could Be Better

  • Only 16 servings
  • Premium price
  • 760 cal (less than extreme gainers)
  • Large serving size

Who Is This For?

Best For

  • Lean mass gain
  • Hard gainers wanting quality calories
  • Those wanting oat-based carbs
  • Those wanting moderate calorie gainer

Not Ideal For

  • Those wanting 1000+ calorie gainer
  • Budget seekers
  • Those wanting more servings
  • Those wanting plant-based gainer

Our Verdict

8.0/10 — Very Good

ON Gold Standard Gainer is the quality mass gainer — oat-based carbs with 55g protein and only 6g sugar at 760 calories. The moderate approach promotes lean mass gain over the sugar-bomb extreme gainers.

Alternatives to Consider

No direct alternatives listed for this product yet.