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Quest Nutrition

Protein Powder, Peanut Butter

Peanut butter · Whey Protein Isolate, Casein, Micellar Casein, Milk Protein Isolate · 31g serving

#139in Protein Powder(347)
✓ Gluten-Free✓ Kosher
1/2
XRay Score
60/100
Performance
P/kcal$P:F▾ CFb
At-a-Glance
23g
Protein /serving
0g
Fiber /serving
120
kcal /serving
19.2g
Protein /100kcal
Performance
ProteinEfficiencyValue forMoneyLeannessLow CarbFiber
Where to Buy
iHerbBest value
1.6 lb
US$34.97 for pack
Buy Now
Ships Worldwide
🇺🇸 Prices in USD
View more buying options

XRay Summary

  • Ranks #139 of 347 · XRay Score 60/100
  • Strength: Low Carb (Top 27%)
  • Protein Source: Milk Blend
  • Flavor: Nutty
  • Dietary: Kosher Certified And Gluten-Free

Protein Powder, Peanut Butter by Quest Nutrition scores above average overall in the protein powder category with an XRay Score of 60/100, placing #139 out of 347. Its strongest dimension is low carb (top 27%), appealing to low-carb and keto lifestyles. The protein comes from a milk protein blend, combining the benefits of both whey and casein. On the flavor front, expect nutty tones. This product also is Kosher certified and gluten-free.

How It Ranks

Ranked against 347 products in this category.

XRay Score5D weighted score across all dimensions
#139 of 347
60/100XRay Score
Protein Efficiencygrams of protein per 100 kcal — higher is better
#165 of 347
19.2g/100kcal23.0g/serving53rd percentile
Value for Moneygrams of protein per unit of currency — higher is better
No data
——
Leannessprotein-to-fat ratio — higher is better
#117 of 313
15.3:163rd percentile
Low Carbnet carbs per 100g — lower is better
#63 of 229
6.5g/100g2.0g/serving73rd percentile
Fiberfiber per 100g — higher is better
No data
——

Leaderboard

XRay Score — Protein Powder (347 products)

RankProductProtein Eff.g/100kcalScore/100
#1
Impact Soy Protein (Unflavoured)
Impact Soy Protein (Unflavoured)
MyProtein
23.6g/100kcal98
···
#137
Warrior Blend Protein (Pumpkin Spice)
Warrior Blend Protein (Pumpkin Spice)
Sunwarrior
20.0g/100kcal61
#138
Impact Pea Protein (Coffee & Walnut)
Impact Pea Protein (Coffee & Walnut)
MyVegan
18.3g/100kcal60
#139
Protein Powder, Peanut Butter
Protein Powder, Peanut Butter
Quest Nutrition
19.2g/100kcal60
#140
Gold Standard® 100% Casein, Creamy Vanilla
Gold Standard® 100% Casein, Creamy Vanilla
Optimum Nutrition
20.0g/100kcal60
#141
Gold Standard® 100% Whey, Extreme Milk Chocolate
Gold Standard® 100% Whey, Extreme Milk Chocolate
Optimum Nutrition
20.0g/100kcal60
See all 347 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=347)
Learn more about our methodology →

Macro Split

120kcal/serving
Protein
81%
Fat
12%
Carbs
7%

Nutrition

Macronutrient breakdown and product details.

NutrientPer Serving (31g)Per 100g
Energy120kcal387.1kcal
Protein23g74.19g
Total Fat1.5g4.84g
Sat. Fat0g0g
Carbohydrates2g6.45g
Fiber0g0g
Sugar1g3.23g
Sodium200mg645.16mg

Shop

Best prices across retailers — shown in your selected currency.

ProductRetailerPricePer ServingShips to
1.6 lb
iHerb
Worldwide
US$34.97
—
Buy Now
1.6 lb
iHerb
US$34.97
—
Worldwide
Buy
3 lb
iHerb
Worldwide
US$51.73
—
Buy Now
3 lb
iHerb
US$51.73
—
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.

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Quest Nutrition Protein Powder, Peanut Butter
Quest NutritionProtein Powder, Peanut ButterProtein Powder · Nutty · Milk Blend · #139 of 347 Protein Powders
Gluten-FreeKosher
XRay Score
60/100
Weighted across
5 dimensions
Protein Efficiency19.2 g/100kcalValue for Money—Leanness15.3:1 P:FLow Carb6.5g net/100gFiber—
This productProtein Powder avg
Nutrition
/ serving 31g/ 100g
Calories120 kcal387 kcal
Protein23g74g
Fat1.5g4.8g
Carbs (total)2.0g6.5g
Fiber0.0g0.0g
Sugar1.0g3.2g
Macro Split
120kcal/svg
Protein
81%
Fat
12%
Carbs
7%
Protein Powder Rankings
Value
Rank
Protein Efficiency
19.2 g/100kcal
#165/347
Value for Money
—
—
Leanness
15.3:1 P:F
#117/313
Low Carb
6.5g net/100g
#63/229
Fiber
—
—
MacroXray logoMACROXRAY
Generated on Jun 14, 2026 bymacroxray.com
YOUR PROTEIN.YOUR RULES. RANKED.
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