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Optimum Nutrition

Gold Standard® 100% Casein, Chocolate Peanut Butter

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

#147in Protein Powder(244)
✓ Vegetarian
1/2
XRay Score
52/100
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 #147 of 244 · XRay Score 52/100
  • Strength: Leanness (Top 26%)
  • Weakness: Value For Money (Bottom 79%)
  • Protein Source: Casein
  • Flavor: Chocolate And Nutty

Gold Standard® 100% Casein, Chocolate Peanut Butter by Optimum Nutrition performs at par with most competitors in the protein powder category with an XRay Score of 52/100, placing #147 out of 244. Its strongest dimension is leanness (top 26%), with a very clean protein-to-fat profile. On the flip side, price-to-protein ratio trails competitors (bottom 79% of the category). 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 244 products in this category.

XRay Score5D weighted score across all dimensions
#147 of 244
52/100XRay Score
Protein Efficiencygrams of protein per 100 kcal — higher is better
#72 of 244
20.0g/100kcal24.0g/serving71st percentile
Value for Moneygrams of protein per unit of currency — higher is better
#143 of 182
12.2 g/US$22nd percentile
Leannessprotein-to-fat ratio — higher is better
#57 of 219
24.0:174th percentile
Low Carbnet carbs per 100g — lower is better
#66 of 134
8.8g/100g3.0g/serving51st percentile
Fiberfiber per 100g — higher is better
#57 of 75
2.9g/100g1.0g/serving24th percentile

Leaderboard

XRay Score — Protein Powder (244 products)

RankProductProtein Eff.g/100kcalScore/100
#1
Impact Vegan Protein (Unflavoured)
Impact Vegan Protein (Unflavoured)
MyVegan
23.3g/100kcal96
···
#146
Impact Diet Whey (Banana)
Impact Diet Whey (Banana)
MyProtein
16.3g/100kcal52
#147
Gold Standard® 100% Casein, Chocolate Supreme
Gold Standard® 100% Casein, Chocolate Supreme
Optimum Nutrition
20.0g/100kcal52
—
Gold Standard® 100% Casein, Chocolate Peanut Butter
Gold Standard® 100% Casein, Chocolate Peanut Butter
Optimum Nutrition
20.0g/100kcal52
···
#149
Protein Powder, Cookies & Cream
Protein Powder, Cookies & Cream
Quest Nutrition
20.0g/100kcal51
See all 244 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=244)
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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