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Optimum Nutrition

Gold Standard® 100% Casein, Chocolate Peanut Butter, 3.97 lb (1.8 kg)

Chocolate peanut butter · Casein, Micellar Casein · 34g serving

#57in Protein Powder(129)
✓ Vegetarian
1/2
XRay Score
61/100
Performance
P/kcal$P:F▾ CFb
At-a-Glance
24g
Protein /serving
1g
Fiber /serving
120
kcal /serving
20.0g
Protein /100kcal
Performance
ProteinEfficiencyValue forMoneyLeannessLow CarbFiber
Where to Buy
iHerbBest value
3.97 lb · 53 servings
US$1.98/serving
US$104.68 for pack
Buy Now
Ships Worldwide
🇺🇸 Prices in USD
View more buying options

XRay Summary

  • Ranks #57 of 129 · XRay Score 61/100
  • Strength: Leanness (Top 29%)
  • Protein Source: Casein
  • Flavor: Chocolate And Nutty

Gold Standard® 100% Casein, Chocolate Peanut Butter, 3.97 lb (1.8 kg) by Optimum Nutrition sits comfortably in the upper half in the protein powder category with an XRay Score of 61/100, placing #57 out of 129. Its strongest dimension is leanness (top 29%), with a very clean protein-to-fat profile. It uses casein protein, a slow-digesting dairy source often chosen for sustained amino acid release. On the flavor front, expect chocolate and nutty tones.

How It Ranks

Ranked against 129 products in this category.

XRay Score5D weighted score across all dimensions
#57 of 129
61/100XRay Score
Protein Efficiencygrams of protein per 100 kcal — higher is better
#39 of 129
20.0g/100kcal24.0g/serving70th percentile
Value for Moneygrams of protein per unit of currency — higher is better
#31 of 61
12.2 g/US$50th percentile
Leannessprotein-to-fat ratio — higher is better
#37 of 124
24.0:171st percentile
Low Carbnet carbs per 100g — lower is better
#34 of 83
8.8g/100g3.0g/serving60th percentile
Fiberfiber per 100g — higher is better
#20 of 35
2.9g/100g1.0g/serving44th percentile

Leaderboard

XRay Score — Protein Powder (129 products)

RankProductProtein Eff.g/100kcalScore/100
#1
ISO100® Hydrolyzed, 100% Whey Protein Isolate, Fruity Pebbles, 3 lb (1.4 kg)
ISO100® Hydrolyzed, 100% Whey Protein Isolate, Fruity Pebbles, 3 lb (1.4 kg)
Dymatize
22.7g/100kcal98
—
ISO100® Hydrolyzed, 100% Whey Protein Isolate, Gourmet Vanilla, 5 lb (2.3 kg)
ISO100® Hydrolyzed, 100% Whey Protein Isolate, Gourmet Vanilla, 5 lb (2.3 kg)
Dymatize
22.7g/100kcal98
···
#55
Gold Standard® 100% Whey, Chocolate Malt, 5 lb (2.27 kg)
Gold Standard® 100% Whey, Chocolate Malt, 5 lb (2.27 kg)
Optimum Nutrition
18.5g/100kcal63
#56
Gold Standard® 100% Whey, Extreme Milk Chocolate, 5.01 lb (2.27 kg)
Gold Standard® 100% Whey, Extreme Milk Chocolate, 5.01 lb (2.27 kg)
Optimum Nutrition
20.0g/100kcal62
#57
Gold Standard® 100% Casein, Chocolate Peanut Butter, 3.97 lb (1.8 kg)
Gold Standard® 100% Casein, Chocolate Peanut Butter, 3.97 lb (1.8 kg)
Optimum Nutrition
20.0g/100kcal61
—
Gold Standard® 100% Casein, Chocolate Supreme, 3.97 lb (1.8 kg)
Gold Standard® 100% Casein, Chocolate Supreme, 3.97 lb (1.8 kg)
Optimum Nutrition
20.0g/100kcal61
···
#59
Gold Standard® 100% Whey, Vanilla Ice Cream, 1.98 lb (899 g)
Gold Standard® 100% Whey, Vanilla Ice Cream, 1.98 lb (899 g)
Optimum Nutrition
20.0g/100kcal60
—
Gold Standard® 100% Whey, French Vanilla Creme, 2 lb (907 g)
Gold Standard® 100% Whey, French Vanilla Creme, 2 lb (907 g)
Optimum Nutrition
20.0g/100kcal60
—
Gold Standard® 100% Whey Protein, Double Rich Chocolate, 1.98 lb (899 g)
Gold Standard® 100% Whey Protein, Double Rich Chocolate, 1.98 lb (899 g)
Optimum Nutrition
20.0g/100kcal60
See all 129 ranked →

Performance

Visual comparison across the 5 dimensions and macronutrient split.

Radar

How this product compares on each dimension — overlaid on the category median (gray). Larger area is always better. Hover any label for raw values and formula.

ProteinEfficiencyValue forMoneyLeannessLow CarbFiber
This productAverage Protein Powder(n=129)
Learn more about our methodology →

Macro Split

120kcal/serving
Protein
79%
Fat
7%
Carbs
14%

Nutrition

Macronutrient breakdown and product details.

NutrientPer Serving (34g)Per 100g
Energy120kcal352.94kcal
Protein24g70.59g
Total Fat1g2.94g
Sat. Fat0g0g
Carbohydrates4g11.76g
Fiber1g2.94g
Sugar1g2.94g
Sodium240mg705.88mg

Shop

Best prices across retailers — shown in your selected currency.

ProductRetailerPricePer ServingShips to
3.97 lb1802g · 53 sv
Best Value
iHerb
Worldwide
US$104.68
US$1.98/sv
Buy Now
3.97 lb1802g · 53 servings
iHerb
Best Value
US$104.68
US$1.98/serving
Worldwide
Buy
Prices shown in each retailer's original currency. Shipping availability and delivery to your country depend on the retailer.

Disclaimer — All nutritional data and product information is provided to the best of our knowledge based on publicly available sources and may contain inaccuracies. MacroXray is not responsible for discrepancies between listed and actual product data. Nothing on this site constitutes medical, dietary, or nutritional advice. Always consult a qualified healthcare professional before making changes to your diet. Dietary restriction labels (e.g. gluten-free, vegan) are based on ingredient information and may not account for cross-contamination or manufacturing processes — always verify with the manufacturer if you have allergies or intolerances. Halal, Kosher and other certifications shown are based on product labeling or third party site descriptions; actual certification status may vary by region and should be confirmed with the certifying body or manufacturer. Prices shown are sourced from third-party retailers at the time of last scan and may have changed since then. MacroXray is not a retailer and does not sell products directly.

MACROXRAY

Your Protein. Your Rules. Ranked. We rank based on published nutrition data — no sponsored rankings, no mystery grades. Just numbers.

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