Branded Food · LUNA

Luna Bar, Peanut Butter

According to USDA FoodData Central (FDC ID 1865834, data refreshed July 2026), nutrition facts per 40g serving, sourced verbatim.

140
Caloriesmoderate density
3.0g
Proteinmoderate · 6% DV
26.0g
Carbsmoderate · 9% DV
4.5g
Fatmoderate · 6% DV
140 calories per 40g serving

Luna Bar, Peanut Butter contains 140 calories per 40g serving according to USDA FoodData Central. It has 3.0g of protein, 4.5g of fat, and 26.0g of carbohydrates per serving. Data is sourced verbatim from the Branded Food database, refreshed July 2026.

  • More protein than 43% of USDA whole foods

The verdict

Luna Bar, Peanut Butter is fiber-rich, with 17.5g of dietary fiber per 100g.

7.5g
protein per 100g
Top 57%
protein vs USDA whole foods
350
calories per 100g
17.5g
fiber per 100g

Percentile computed against the 7,880 USDA SR Legacy and Foundation whole foods with a protein value, not branded or processed items.

FDA labeling rules →

Luna Bar, Peanut Butter by LUNA contains 140 calories per 40g serving (350 kcal per 100g USDA basis), according to the USDA FoodData Central database. It provides 3.0g of protein, 4.5g of fat, and 26.0g of carbohydrates per 40g serving. Dietary fiber: 7.0g. Below you will find a complete nutrient breakdown including vitamins, minerals, and daily value percentages based on a 2,000 calorie diet. Values shown match the FDA-format Nutrition Label, computed per serving from USDA per-100g amounts via the manufacturer-declared serving size. Source: USDA laboratory analysis and manufacturer-reported label data for food products sold in the United States.

🌾 Good Fiber Source

Where this data comes from

USDA FoodData Central is the United States government's authoritative reference for food composition, maintained by the Agricultural Research Service and updated as new laboratory analyses and manufacturer submissions are processed. Luna Bar, Peanut Butter is catalogued there as FDC ID 1865834, a branded food entry from LUNA. Every figure on this page comes from USDA laboratory analysis under the FDC Branded Food program, standardized to 100 g so it can be compared fairly against any other food in the database. The Nutrition Label below shows the per-serving values that match the package; the per-100 g basis is noted where the two differ.

By the per-100g standardization, Luna Bar, Peanut Butter reads as good fiber source within common dietary frameworks. Check the full breakdown above for vitamins, minerals, and amino acids.

Nutritional Value at a Glance

Luna Bar, Peanut Butter is a carbohydrate-dense food that can serve as a quick energy source.

At 25% of the Daily Value for fiber, this is a good source that supports digestive health and may help with satiety.

Notable micronutrients include Calcium, Ca (48% DV), and Iron, Fe (38% DV).

Allergen indicators

Our text scan flagged these FDA Big 9 major-allergen indicators in this product's name and brand description:

  • Milk
  • Peanuts

Always verify with the physical package label. Our detection is a keyword scan over USDA-published product names and brand text, it is conservative-positive (flags likely allergens) but cannot guarantee completeness or accuracy. Manufacturers may reformulate without notice; consumers with anaphylaxis-risk allergies must rely on the FDA-mandated ingredient and allergen statement printed on the package itself.

Nutrition Facts Serving size 40g Amount per serving Calories 140 % Daily Value* Total Fat 5g 6% Saturated Fat 1g 5% Trans Fat 0g Cholesterol 0mg 0% Sodium 190mg 8% Total Carbohydrate 26g 9% Dietary Fiber 7g 25% Total Sugars 11g Includes 0g Added Sugars 0% Protein 3g Vitamin D 60mcg 300% Calcium 250mg 19% Iron 3mg 15% Potassium 105mg 2% * The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Values per 40g serving · 350 kcal per 100g basis

Macro Breakdown

140
Calories per 40g serving
350 kcal per 100g (USDA basis)

140 kcal = 7% of FDA 2,000 kcal Daily Value

0%100%7of 2,000 kcal
140 kcal = 7% of FDA 2,000 kcal Daily Value
P: 3.0gF: 4.5gC: 26.0g
3.0g
Protein
6% DV
4.5g
Total Fat
6% DV
26.0g
Carbs
9% DV
7.0g
Fiber
25% DV
11.0g
Sugar
no FDA DV
190mg
Sodium
8% DV

Values shown per 40g serving, match the FDA Nutrition Label panel. USDA stores the raw amounts per 100g; this page applies the manufacturer-declared serving size to render the on-package values.

Where Luna Bar, Peanut Butter ranks on protein

Its 7.5g of protein per 100g placed against every USDA reference (whole) food, the 7,880 SR Legacy and Foundation items with a protein value.

Protein per 100g - Luna Bar, Peanut Butter vs every USDA reference food

USDA reference (whole) foods with a protein value

8 43rd percentile higher than 43% of 7,880 USDA reference foods

0–5: 2,829 USDA reference foods (36%). Below this entry. 5–10: 1,170 USDA reference foods (15%). This entry sits in this band. 10–15: 863 USDA reference foods (11%). Above this entry. 15–20: 783 USDA reference foods (10%). Above this entry. 20–25: 1,085 USDA reference foods (14%). Above this entry. 25–30: 826 USDA reference foods (10%). Above this entry. 30–35: 230 USDA reference foods (3%). Above this entry. 35–40: 32 USDA reference foods (0%). Above this entry. 40–45: 9 USDA reference foods (0%). Above this entry. 45–50: 11 USDA reference foods (0%). Above this entry. 50–55: 9 USDA reference foods (0%). Above this entry. 55–60: 33 USDA reference foods (0%). Above this entry. This food 0 60 every USDA reference food, bucketed by value

Each bar is a band; taller bars hold more USDA reference foods. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USDA FoodData Central, SR Legacy & Foundation · July 2026

Full Nutrient Breakdown

Every nutrient USDA reports for this food, per 100 g, with each value's share of the FDA Daily Value shown as a bar.

Macronutrients

Nutrient Amount % DV
Carbohydrate, by difference 65.0 G
24%
Energy 350 KCAL
Fiber, total dietary 17.5 G
63%
Protein 7.5 G
15%
Total Sugars 27.5 G
Total lipid (fat) 11.3 G
14%
Carbohydrate, other 20.0 G
Fiber, insoluble 10.0 G

Vitamins

Nutrient Amount % DV
Folate, total 300.0 UG
Niacin 5 MG
Riboflavin 0 MG
Thiamin 0 MG
Vitamin B-12 3.0 UG
Vitamin B-6 1 MG
Vitamin C, total ascorbic acid 30 MG

Minerals

Nutrient Amount % DV
Calcium, Ca 625 MG
48%
Iron, Fe 7 MG
38%
Potassium, K 262 MG
6%
Sodium, Na 475 MG
21%
Vitamin D (D2 + D3), International Units 150 IU
19%
Vitamin A, IU 1250 IU

Lipids

Nutrient Amount % DV
Cholesterol 0 MG
0%
Fatty acids, total saturated 2.5 G
13%
Fatty acids, total trans 0.00 G

Key takeaways

  • Luna Bar, Peanut Butter delivers 3.0g of protein per 100g, more than 43% of USDA whole foods. See the protein ranking
  • It carries 140 calories per 100g.
  • Its standout micronutrient is calcium, ca, at 48% of the Daily Value per 100g.
  • Based on its per-100g profile, it fits good fiber source patterns.

Nearby Foods

Foods in the same category with similar calorie content, useful for swaps, substitutions, and side-by-side comparison.

No close calorie matches in the same category. Browse the full category index to explore other foods, or use the compare tool to line up any two foods side-by-side.

Frequently Asked Questions

How many calories are in Luna Bar, Peanut Butter? ▼
Luna Bar, Peanut Butter contains 140 calories per 40g serving (350 cal per 100g basis, USDA storage). It has 3.0g of protein, 4.5g of fat, and 26.0g of carbohydrates.
What are the macros in Luna Bar, Peanut Butter? ▼
Per 40g serving, Luna Bar, Peanut Butter has 3.0g protein (9% of calories), 4.5g fat, and 26.0g carbs. Fiber: 7.0g. Sugar: 11.0g.
How much sodium is in Luna Bar, Peanut Butter? ▼
Luna Bar, Peanut Butter contains 190mg of sodium per 40g serving, which is 8% of the recommended daily limit (2,300mg).
Is Luna Bar, Peanut Butter high in fiber? ▼
Luna Bar, Peanut Butter contains 7.0g of dietary fiber per 40g serving, which is 25% of the daily recommended value (28g). This is considered a good source of fiber.
Is Luna Bar, Peanut Butter keto-friendly? ▼
Luna Bar, Peanut Butter has 26.0g of carbs per 40g serving (74% of calories), which may be too high for strict keto diets (typically under 5g net carbs per serving).
Is Luna Bar, Peanut Butter good for a diet? ▼
Luna Bar, Peanut Butter has 140 calories per 40g serving. Fat content: 4.5g. Contains 7.0g fiber which aids digestion.
What vitamins and minerals are in Luna Bar, Peanut Butter? ▼
Luna Bar, Peanut Butter is notably rich in Calcium, Ca (48% DV), Iron, Fe (38% DV). Daily-value percentages are computed against the USDA per-100g standardization basis as published in FoodData Central.
How does Luna Bar, Peanut Butter compare to other foods? ▼
Luna Bar, Peanut Butter provides 140 calories and 3.0g protein per 40g serving. That is 47 calories per gram of protein. Use our compare tool to see how it stacks up against similar foods in the same category.

Nutrition Guides

Learn how to interpret and use nutrition data effectively

How to Read Nutrition Labels
Understanding Daily Values (%DV)
Comparing Foods for Better Nutrition
Hidden Sugars in Common Foods
How to Compare Foods for Healthier Choices

Primary source data

📂
USDA FoodData Central
Federal nutrient database, every nutrient figure here
🌱
FDA Food Labeling & Nutrition
Regulatory definitions for labels and serving sizes
💉
NIH Office of Dietary Supplements
Federal vitamin and supplement fact sheets
⚠️
USDA FSIS Recalls
Federal meat, poultry, and egg recall alerts
📣
FDA Food Recalls
Federal alerts for FDA-regulated food products
📋
Dietary Guidelines for Americans
USDA + HHS joint nutrition guidance

Data Sources & Methodology

Data from USDA FoodData Central, April 2026 release. See our methodology.

Source: USDA FoodData Central (FDC ID 1865834) — Branded Food database. Verify with USDA →

Source: FDA 2,000-calorie Daily Value reference — %DV computed against the USDA per-100g standardization basis.

How serving-size math works on this page: USDA stores all nutrient amounts on a per-100g basis for consistency across the catalog. Because the manufacturer declared a 40g serving for this product, the headline values (calories, macros) are multiplied by 40/100 = 0.400 to render the same values you would read on the FDA Nutrition Facts panel. The page surfaces both bases for full transparency.

Disclaimer: This information is for reference only and should not replace professional dietary advice. Nutrient content may vary by brand, preparation method, and seasonal factors.

All federal data sources used on this page

Every figure on GetFoodFacts is rendered directly from official USDA FoodData Central records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of July 2026.