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PhD

Smart Protein Bar (Birthday Cake)

Birthday Cake · Whey Concentrate · 64g serving

#65in Protein Bar(319)
1/2
XRay Score
71/100
Performance
P/kcal$P:F▾ CFb
At-a-Glance
20g
Protein /serving
—
Fiber /serving
259
kcal /serving
7.7g
Protein /100kcal
Performance
ProteinEfficiencyValue forMoneyLeannessLow CarbFiber
Where to Buy
Amazon UKBest value
64g x 12 · 12 servings
US$2.11/serving(approx.)
US$25.32 for pack
Buy Now
Check retailer for shipping
🇺🇸 Prices in USD
Affiliate link · we may earn a small commission
View more buying options

XRay Summary

  • Ranks #65 of 319 · XRay Score 71/100
  • Strength: Value For Money (Top 4%)
  • Protein Source: Whey Concentrate
  • Flavor: Sweet

Smart Protein Bar (Birthday Cake) by PhD sits comfortably in the upper half in the protein bar category with an XRay Score of 71/100, placing #65 out of 319. Its strongest dimension is value for money (top 4%), standing out on cost-effectiveness. The protein base is whey concentrate — a well-rounded dairy protein that retains more natural nutrients. Flavor-wise, it features sweet notes.

How It Ranks

Ranked against 319 products in this category.

XRay Score5D weighted score across all dimensions
#65 of 319
71/100XRay Score
Protein Efficiencygrams of protein per 100 kcal — higher is better
#147 of 319
7.7g/100kcal20.0g/serving54th percentile
Value for Moneygrams of protein per unit of currency — higher is better
#14 of 288
9.48 g/US$96th percentile
Leannessprotein-to-fat ratio — higher is better
#108 of 308
2.1:165th percentile
Low Carbnet carbs per 100g — lower is better
No data
——
Fiberfiber per 100g — higher is better
No data
——

Leaderboard

XRay Score — Protein Bar (319 products)

RankProductProtein Eff.g/100kcalScore/100
#1
David Protein Bar, Cake Batter
David Protein Bar, Cake Batter
David
18.7g/100kcal97
···
#63
Protein Bar, Maple Glazed Doughnut
Protein Bar, Maple Glazed Doughnut
One Brands
9.1g/100kcal71
#64
Protein Bar, Crispy Cookies & Cream
Protein Bar, Crispy Cookies & Cream
Quest Nutrition
12.0g/100kcal71
#65
Smart Protein Bar (Birthday Cake)
Smart Protein Bar (Birthday Cake)
PhD
7.7g/100kcal71
#66
Puff, Protein Bars, Salted Caramel
Puff, Protein Bars, Salted Caramel
Built
12.1g/100kcal71
#67
Impact Protein Bar (Dark Chocolate Sea Salt)
Impact Protein Bar (Dark Chocolate Sea Salt)
MyProtein
8.7g/100kcal71
See all 319 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 Bar(n=319)
Learn more about our methodology →

Macro Split

259kcal/serving
Protein
30%
Fat
32%
Carbs
38%

Nutrition

Macronutrient breakdown and product details.

NutrientPer Serving (64g)Per 100g
Energy259kcal404.69kcal
Protein20g31.25g
Total Fat9.4g14.69g
Sat. Fat3.7g5.78g
Carbohydrates26g40.62g
Fiber——
Sugar2.2g3.44g
Sodium——

Shop

Best prices across retailers — shown in your selected currency.

ProductRetailerPricePer ServingShips to
64g x 12768g · 12 sv
Best Value
Amazon UK
United Kingdom
£18.59
£1.55/sv
Buy Now
64g x 12768g · 12 servings
Amazon UK
Best Value
£18.59
US$25.32
£1.55/serving
United Kingdom
Buy
Prices shown in each retailer's original currency. Shipping availability and delivery to your country depend on the retailer. Affiliate disclosure: when you click a “Buy” link and make a purchase, we may earn a small commission at no extra cost to you.

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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PhDSmart Protein Bar (Birthday Cake)Protein Bar · Sweet · Whey Concentrate · #65 of 319 Protein Bars
XRay Score
71/100
Weighted across
5 dimensions
Protein Efficiency7.7 g/100kcalValue for Money9.5 g/$Leanness2.1:1 P:FLow Carb—Fiber—
This productProtein Bar avg
Nutrition
/ serving 64g/ 100g
Calories259 kcal405 kcal
Protein20g31g
Fat9.4g15g
Carbs (total)26g41g
Fiber——
Sugar2.2g3.4g
Macro Split
259kcal/svg
Protein
30%
Fat
32%
Carbs
38%
Protein Bar Rankings
Value
Rank
Protein Efficiency
7.7 g/100kcal
#147/319
Value for Money
9.5 g/$
#14/288
Leanness
2.1:1 P:F
#108/308
Low Carb
—
—
Fiber
—
—
MACROXRAY
Generated on May 9, 2026 bymacroxray.com
YOUR PROTEIN.YOUR RULES. RANKED.
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