Costco Protein Bars — Ingredient Scan Results

We scanned every protein bars we could find at Costco and ranked them purely by ingredient quality. No sponsorships, no affiliate deals — just data.

4
Scanned
66
Avg Score
1
Clean Labels

Costco Protein Bars — Ranked by Ingredient Score

#1

Chocolate Brownie Protein Bar

by Kirkland

90
/ 100
1 additive 2 seed oils

Checkit score 90/100. contains es:soluble corn fiber cashew butter isomalto oligosaccharides, es:natural flavors sea salt sunflower lecithin steviol glycosides. not organic.

#2

CHOCOLATE PEANUT BUTTER CHUNK PROTEIN BAR, CHOCOLATE PEANUT BUTTER CHUNK

by Costco Companies Inc.

74
/ 100
Clean label

Checkit score 74/100. not organic.

#3

Chi lately Chunks Cookie Dough Protein Bar

by Kirkland Signature

49
/ 100
milk nuts 4 additives 3 seed oils

Checkit score 49/100. 1 moderate additive(s). contains soluble corn fiber, corn fiber. not organic.

#4

PEANUT BUTTER & SEMISWEET CHOCOLATE CHIP CHEWY PROTEIN BARS, PEANUT BUTTER & SEMISWEET CHOCOLATE CHIP

by Costco Companies Inc.

49
/ 100
milk nuts peanuts soybeans es:coco 4 additives 3 seed oils

Checkit score 49/100. contains corn syrup, palm kernel oil. not organic.

Download CheckIt AI — Scan at Costco in Real Time

Same Category, Different Store

Walmart Protein BarsTarget Protein BarsTrader Joe's Protein BarsWhole Foods Protein BarsKroger Protein BarsALDI Protein BarsSam's Club Protein BarsPublix Protein BarsH-E-B Protein BarsWegmans Protein BarsSafeway Protein BarsMeijer Protein Bars

More Costco Scan Results

Costco Cereal & GranolaCostco YogurtCostco Chips & CrispsCostco Snacks & CrackersCostco Bread & BakeryCostco Sauces & Dressings
See cleanest protein bars across all stores →

Product availability varies by location. Scores based on ingredient analysis. Not medical advice.

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Ingredient Safety

Red 40Yellow 5Yellow 6AspartameBHABHTSodium NitriteCarrageenanSucraloseTitanium DioxidePotassium BromateHigh Fructose Corn SyrupMSGSodium BenzoateTBHQPolysorbate 80Red 3Caramel ColorSoy LecithinNatural FlavorsAcesulfame-KMaltodextrinXanthan GumGuar GumCitric AcidErythritolBlue 1Propyl GallateMono & DiglyceridesPectinAcacia GumAgarAnnattoAutolyzed YeastAzodicarbonamideBVOCalcium PropionateCarnauba WaxCelluloseDATEMDisodium InosinateGellan GumKonjacLocust Bean GumMethylcelluloseSodium AlginateSodium Aluminum PhosphateTragacanth Gum

Food Safety Answers

Is Red 40 Banned in Europe?What Foods Have Seed Oils?Is Carrageenan Safe?Worst Food AdditivesIs BHA Safe?Does Gatorade Have Food Dye?Titanium Dioxide in FoodIs Aspartame Safe?Is Sodium Nitrite Dangerous?Is MSG Bad for You?What Is HFCS?Is Sucralose Safe?Food Dye Banned in Europe?Is Potassium Bromate Banned?What Is Natural Flavors?Is Soy Lecithin Bad?Is Maltodextrin Bad?Is Xanthan Gum Safe?Is Red 3 Banned?Is TBHQ Bad?Foods Banned in Other CountriesIs Citric Acid Bad?What Is Polysorbate 80?Is Caramel Color Safe?Is Palm Oil Bad?What Is Cellulose in Food?Is Acesulfame-K Safe?Is Erythritol Safe?Is Guar Gum Safe?Is Food in America Safe?Cheerios & PesticidesBest Food Scanner AppHow to Read Food LabelsIs Yellow 5 Safe?Are Preservatives Bad?Artificial Sweetener SafetyIs Canola Oil Bad?Hidden Names for SugarFoods That Cause InflammationIs Annatto Safe?Is Azodicarbonamide Safe?Is Calcium Propionate Safe?Is Carnauba Wax Safe?Is Gelatin Halal?Is Locust Bean Gum Safe?Mono & Diglycerides SafetyIs Pectin Safe?Propylene Glycol in FoodWhat Is Agar Agar?What Is BVO?What Is DATEM?What Is Sodium Alginate?What Is Sodium Benzoate?

Cleanest Rankings

Cleanest Protein BarsCleanest CerealCleanest YogurtCleanest ChipsCleanest SnacksCleanest BreadCleanest SaucesCleanest JuiceCleanest CookiesCleanest CandyCleanest Ice CreamCleanest PastaCleanest Baby FoodCleanest Energy DrinksCleanest Protein PowderCleanest Frozen MealsCleanest CondimentsCleanest SodaCleanest Pet Food

Free-From Finder

Protein Bars Without Seed OilsCereal Without Artificial ColorsSnacks Without PreservativesYogurt Without Artificial SweetenersChips Without Seed OilsCookies Without Artificial ColorsCandy Without Artificial ColorsSoda Without Artificial SweetenersFrozen Meals Without MSGBaby Food Without SugarEnergy Drinks Without SweetenersProtein Bars Without SweetenersSnacks Without Seed OilsCereal Without SugarBread Without PreservativesIce Cream Without CarrageenanPasta Without Gluten

Store Scan Results

Costco Protein Bars RankedWalmart Cereal RankedTarget Snacks RankedWhole Foods Yogurt RankedKroger Bread RankedAldi Snacks RankedCostco Snacks RankedWalmart Chips RankedTarget Cookies RankedTrader Joe's Snacks RankedWhole Foods Bread RankedWalmart Juice RankedTarget Cereal RankedWalmart Bread RankedKroger Snacks RankedAldi Cereal RankedWhole Foods Snacks RankedKroger Cereal RankedAldi Bread RankedTrader Joe's Cereal RankedCostco Bread Ranked

Ingredient Comparisons

Red 40 vs Yellow 5Red 40 vs Yellow 6Aspartame vs SucraloseAspartame vs HFCSBHA vs BHTRed 40 vs AspartameCarrageenan vs Soy LecithinSucralose vs HFCSTBHQ vs BHATBHQ vs BHTRed 40 vs Titanium DioxideRed 40 vs Caramel ColorMSG vs Natural FlavorsSodium Benzoate vs Potassium BromateYellow 5 vs Red 3Polysorbate 80 vs CarrageenanXanthan Gum vs Guar GumRed 40 vs Red 3Erythritol vs SucraloseMaltodextrin vs HFCSAll Ingredient Comparisons

Store Reports

Walmart Report CardTarget Report CardCostco Report CardKroger Report CardWhole Foods Report CardTrader Joe's Report CardAldi Report CardSam's Club Report Card

Original Research

All Research StudiesGrocery Product Safety StudySeed Oil CensusSafest Grocery StoresSchool Lunch Safety ReportMost Common AdditivesBanned Ingredients in US Products

App Comparisons

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Guides & Tools

Download CheckIt AIUser ReviewsFood RecallsBanned in EuropeFood Safety ReportIngredient GlossaryStore RankingsIngredient EncyclopediaHealthier Swap FinderOur MethodologyIngredient ComparisonsTopic GuidesAll Food Safety AnswersOpen DataWhat's Really In Your Food
📋 Cite This Data
APACheckIt AI. (2026). "Costco Protein Bars Ranked by Ingredients — 4 Products Scanned | CheckIt AI". Climaverse PBC. Retrieved from https://getcheck.it/scan-results/costco-protein-bars
MLA"Costco Protein Bars Ranked by Ingredients — 4 Products Scanned | CheckIt AI." CheckIt AI, Climaverse PBC, 2026-03-05. https://getcheck.it/scan-results/costco-protein-bars.
HTML Embed<a href="https://getcheck.it/scan-results/costco-protein-bars">Costco Protein Bars Ranked by Ingredients — 4 Products Scanned | CheckIt AI — CheckIt AI</a>
BibTeX@misc{checkit2026scanresultscostcoproteinbars, title = {Costco Protein Bars Ranked by Ingredients — 4 Products Scanned | CheckIt AI}, author = {CheckIt AI}, year = {2026}, publisher = {Climaverse PBC}, url = {https://getcheck.it/scan-results/costco-protein-bars}, note = {Retrieved 2026-03-05} }