Costco Ingredient Safety Report Card: C

C

Costco scored 62/100 across 111 products

62
Avg Score /100
111
Products Analyzed
53%
Clean (≥70)
28%
Avoid (<40)

53% of Costco products scored 70 or above (clean), while 28% scored below 40 (avoid). 32% of products contain seed oils.

Best Finds at Costco

#ProductBrandScore
1Almond ButterKirkland Signature100/100
2Organic Salsa (Medium)Kirkland100/100
3Organic Tomato PasteKirkland Signature100/100
4All-purpose FlourKirkland Signature100/100
5APPLE MANGO YELLOW CARROT PEACH FRUIT & VEGETABLE POUCHES, APPLE MANGO YELLOW CARROT PEACHCostco Companies Inc.100/100

Worst Offenders at Costco

#ProductBrandScoreFlagged
1Trail Mix Snack PacksKirkland,Kirkland Signature,M&M's0/100e102 e110 e129
2Trail MixKirkland0/100e102 e110 e129
3Trail MixKirkland1/100e102 e110 e129
4Kirkland Signature Dipped & Chewy Granola Bar CaramelKirkland Signature7/100e322 e322i e392
5VALENCIA PEANUT BUTTER FILLED PRETZEL NUGGETS PRETZELS, PEANUT BUTTERCostco Companies Inc.10/100e471 e500 e500ii

Most Common Red Flags

How Costco Compares

StoreGradeAvg Score
CostcoC62/100
Trader Joe'sA99/100
Whole FoodsA79/100
KrogerC64/100
TargetC62/100
Sam's ClubC60/100
ALDIC57/100
WalmartC55/100

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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

CheckIt vs YukaCheckIt vs EWGCheckIt vs FooducateCheckIt vs MyFitnessPalCheckIt vs Think DirtyCheckIt vs FigCheckIt vs SooseeCheckIt vs NoomYuka vs EWGYuka vs Fooducate

Category Safety Reports

All CategoriesSnacks Safety ReportFrozen Foods SafetySweet Snacks ReportDesserts Safety ReportMeals Safety ReportBiscuits & CrackersChips Safety ReportCereals Safety ReportSalty Snacks ReportPlant-Based SafetyBeverages Safety

Store × Category Rankings

Walmart Snacks RankedCostco Snacks RankedTarget Snacks RankedWalmart Cereals RankedCostco Frozen FoodsTarget Desserts RankedWhole Foods SnacksTrader Joe's SnacksALDI Snacks RankedKroger Cereals Ranked

Worst & Best Rankings

Worst CandyWorst ChipsWorst SnacksWorst CerealsWorst Frozen FoodsBest SnacksBest CerealsBest Frozen FoodsBest Plant-BasedBest Desserts

Recipe & Meal Guides

All Recipe GuidesGluten-Free BreakfastGluten-Free SnacksDairy-Free DinnerVegan SnacksKeto BreakfastSeed Oil-Free SnacksGluten-Free Dairy-Free SnacksGluten-Free Soy-Free SnacksGF + DF + SF SnacksVegan Gluten-Free SnacksTop 8 Allergen-Free SnacksGF Snacks Without Seed OilsDairy-Free Nut-Free BreakfastGF DF EF Desserts

Store Allergy Guides

GF + DF Snacks at WalmartGF + DF Snacks at CostcoGF + DF Snacks at KrogerGF + DF Snacks at TargetGF + DF Snacks at ALDINut-Free Snacks at WalmartNut-Free Breakfast at CostcoVegan GF Dinner at KrogerDF + SF Lunch at WalmartGF + DF + SF at CostcoTop 8 Free at KrogerSeed Oil Free + GF at Walmart

Brand Report Cards

All Brand ReportsNestlé Safety ReportKellogg's Safety ReportGeneral Mills ReportPringles Safety ReportHaribo Safety ReportMission Foods ReportDoritos Safety ReportCheetos Safety ReportOreo Safety ReportLay's Safety Report

Safe for Conditions

All Condition GuidesIBS-Safe SnacksGERD-Safe DrinksDiabetic-Friendly BreakfastCeliac-Safe SnacksLow-Histamine DinnerADHD-Friendly SnacksAutoimmune BreakfastMigraine-Safe SnacksCrohn's-Safe SnacksEczema-Safe SnacksPCOS-Friendly Breakfast

Store Diet Guides

GF Snacks at WalmartVegan Snacks at WalmartKeto Protein Bars at CostcoGF Snacks at CostcoVegan Snacks at Trader Joe'sGF Cereal at Trader Joe'sDF Snacks at TargetLow Sugar Cereal at KrogerPaleo Snacks at Whole FoodsGF Snacks at ALDI

Diet Product Finder

All Diet ProductsKeto Energy DrinksVegan Protein BarsGluten-Free CerealLow Sugar CookiesDairy-Free Ice CreamPaleo JerkySeed Oil-Free ChipsNut-Free Granola BarsGluten-Free BreadVegan Chocolate

Banned in Europe

All Banned IngredientsRed 40 (Allura Red)Yellow 5 (Tartrazine)Yellow 6 (Sunset Yellow)Red 3 (Erythrosine)Titanium DioxideBHABHTPotassium BromateBrominated Vegetable OilAzodicarbonamideTBHQ

Store Rankings

All Store RankingsWorst Snacks at WalmartWorst Cereal at CostcoWorst Candy at TargetBest Snacks at WalmartBest Snacks at CostcoBest Snacks at Trader Joe'sBest Cereal at Whole FoodsBest Yogurt at TargetWorst Chips at KrogerBest Bread at ALDI

GLP-1 Friendly Foods

All GLP-1 Friendly FoodsGLP-1 Protein BarsGLP-1 YogurtGLP-1 SnacksGLP-1 CerealGLP-1 JerkyGLP-1 Protein Bars at WalmartGLP-1 Snacks at CostcoGLP-1 Yogurt at Trader Joe'sGLP-1 Cereal at Target

Hidden Ingredient Names

All Hidden NamesHidden Names for MSGHidden Names for SugarHidden Names for HFCSHidden Names for Food DyesHidden Names for SoyHidden Names for Trans FatHidden Names for GlutenHidden Names for DairyHidden Names for Seed OilsHidden Names for Palm Oil

Reformulation Tracker

All ReformulationsFanta Orange ChangesMountain Dew ChangesKraft Mac & CheeseCheerios ChangesGatorade ChangesPepsi ChangesTrix Cereal ChangesSubway Bread Changes

Food Safety by Age

All Age GuidesToddler-Safe SnacksBaby-Safe BreakfastKids-Safe SnacksKids-Safe LunchPregnancy-Safe SnacksPregnancy-Safe BreakfastSenior-Friendly SnacksAthlete SnacksNursing-Safe DrinksTeen-Safe Snacks

Ultra-Processed Rankings

All UPF RankingsMost Processed SnacksMost Processed CerealsMost Processed CandyMost Processed ChipsMost Processed Frozen FoodsUPF Snacks at WalmartUPF Cereal at CostcoUPF Chips at TargetUPF Candy at Walmart

Cleanest Brands

All Cleanest BrandsCleanest Snack BrandsCleanest Cereal BrandsCleanest Chip BrandsCleanest Cookie BrandsCleanest Yogurt BrandsCleanest Bread BrandsCleanest Baby Food BrandsCleanest Protein Bar BrandsCleanest Frozen Food Brands

Ingredient Side Effects

All Side EffectsRed 40 Side EffectsYellow 5 Side EffectsAspartame Side EffectsSucralose Side EffectsMSG Side EffectsBHA Side EffectsSodium Benzoate Side EffectsCarrageenan Side EffectsHFCS Side EffectsCaramel Color Side Effects

Brand Exposure Reports

All Brand ReportsNestlé ExposedKellogg's ExposedGeneral Mills ExposedFrito-Lay ExposedKraft ExposedCoca-Cola ExposedPepsi ExposedMars ExposedMondelēz Exposed

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
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📋 Cite This Data
APACheckIt AI. (2026). "Costco Ingredient Safety Report Card: C | CheckIt AI". Climaverse PBC. Retrieved from https://getcheck.it/store-grades/costco
MLA"Costco Ingredient Safety Report Card: C | CheckIt AI." CheckIt AI, Climaverse PBC, 2026-03-05. https://getcheck.it/store-grades/costco.
HTML Embed<a href="https://getcheck.it/store-grades/costco">Costco Ingredient Safety Report Card: C | CheckIt AI — CheckIt AI</a>
BibTeX@misc{checkit2026storegradescostco, title = {Costco Ingredient Safety Report Card: C | CheckIt AI}, author = {CheckIt AI}, year = {2026}, publisher = {Climaverse PBC}, url = {https://getcheck.it/store-grades/costco}, note = {Retrieved 2026-03-05} }