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California Gold Nutrition

Sport, Whey Protein Isolate, Unflavored

Unflavored · Whey Protein Isolate · 31g serving

#10in Protein Powder(347)
✓ Sugar-Free
1/4
XRay Score
93/100
Performance
P/kcal$P:F▾ CFb
At-a-Glance
27g
Protein /serving
0g
Fiber /serving
120
kcal /serving
22.5g
Protein /100kcal
Performance
ProteinEfficiencyValue forMoneyLeannessLow CarbFiber
Where to Buy
iHerbBest value
1 lb
US$28.00 for pack
Buy Now
Ships Worldwide
🇺🇸 Prices in USD
View more buying options

XRay Summary

  • Ranks #10 of 347 · XRay Score 93/100
  • Strength: Low Carb (Top 3%)
  • Protein Source: Whey Isolate

Sport, Whey Protein Isolate, Unflavored by California Gold Nutrition is one of the highest-rated products in the protein powder category with an XRay Score of 93/100, placing #10 out of 347. Its strongest dimension is low carb (top 3%), appealing to low-carb and keto lifestyles. Built on whey isolate — a refined, fast-digesting protein with minimal fat and lactose.

How It Ranks

Ranked against 347 products in this category.

XRay Score5D weighted score across all dimensions
#10 of 347
93/100XRay Score
Protein Efficiencygrams of protein per 100 kcal — higher is better
#33 of 347
22.5g/100kcal27.0g/serving91st percentile
Value for Moneygrams of protein per unit of currency — higher is better
No data
——
Leannessprotein-to-fat ratio — higher is better
No data
——
Low Carbnet carbs per 100g — lower is better
#7 of 229
0.0g/100g0.0g/serving97th 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
···
#8
Impact Soy Protein (Salted Caramel)
Impact Soy Protein (Salted Caramel)
MyProtein
22.6g/100kcal95
#9
Collagen Protein Powder (Vanilla)
Collagen Protein Powder (Vanilla)
MyProtein
24.1g/100kcal95
#10
Sport, Whey Protein Isolate, Unflavored
Sport, Whey Protein Isolate, Unflavored
California Gold Nutrition
22.5g/100kcal93
#11
Impact Soy Protein (Chocolate Smooth)
Impact Soy Protein (Chocolate Smooth)
MyProtein
21.9g/100kcal92
—
Impact Soy Protein (Natural Strawberry)
Impact Soy Protein (Natural Strawberry)
MyProtein
21.9g/100kcal92
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
100%
Fat
0%
Carbs
0%

Nutrition

Macronutrient breakdown and product details.

NutrientPer Serving (31g)Per 100g
Energy120kcal387.1kcal
Protein27g87.1g
Total Fat0g0g
Sat. Fat0g0g
Carbohydrates0g0g
Fiber0g0g
Sugar0g0g
Sodium55mg177.42mg

Shop

Best prices across retailers — shown in your selected currency.

ProductRetailerPricePer ServingShips to
1 lb
iHerb
Worldwide
US$28.00
—
Buy Now
1 lb
iHerb
US$28.00
—
Worldwide
Buy
Prices shown in each retailer's original currency. Shipping availability and delivery to your country depend on the retailer.

Featured In

Articles that analyse or compare this product.

A protein powder scoop and a grilled chicken breast side by side on a dark surface, lit by contrasting warm and teal studio lighting.
A protein powder scoop and a grilled chicken breast side by side on a dark surface, lit by contrasting warm and teal studio lighting.

Protein Powder vs Whole Foods: Which Packs More Protein Per Calorie?

We put our top-ranked protein powders head-to-head against chicken breast, eggs, Greek yogurt, and more — gram for gram, calorie for calorie. The results might change how you plan your meals.

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A protein powder scoop resting on a dark surface with a fine dusting of powder, illuminated by teal-tinted studio lighting.

Best Protein Powder for Weight Loss: Ranked by Protein Per Calorie

We ranked over 300 protein powders by protein efficiency and leanness to find the ones that deliver the most protein per calorie — the only metric that matters when you're cutting.

May 8, 20267 minProtein PowderWeight Loss

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

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California Gold Nutrition Sport, Whey Protein Isolate, Unflavored
California Gold NutritionSport, Whey Protein Isolate, UnflavoredProtein Powder · Plain · Whey Isolate · #10 of 347 Protein Powders
Sugar-Free
XRay Score
93/100
Weighted across
5 dimensions
Protein Efficiency22.5 g/100kcalValue for Money—Leanness—Low Carb0.0g net/100gFiber—
This productProtein Powder avg
Nutrition
/ serving 31g/ 100g
Calories120 kcal387 kcal
Protein27g87g
Fat0.0g0.0g
Carbs (total)0.0g0.0g
Fiber0.0g0.0g
Sugar0.0g0.0g
Macro Split
120kcal/svg
Protein
100%
Fat
0%
Carbs
0%
Protein Powder Rankings
Value
Rank
Protein Efficiency
22.5 g/100kcal
#33/347
Value for Money
—
—
Leanness
—
—
Low Carb
0.0g net/100g
#7/229
Fiber
—
—
MacroXray logoMACROXRAY
Generated on Jun 11, 2026 bymacroxray.com
YOUR PROTEIN.YOUR RULES. RANKED.
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