Blue 2 (Indigo Carmine) vs Red 40 (Allura Red AC) — Which Is Worse?

FactorBlue 2 (Indigo Carmine)Red 40 (Allura Red AC)
E-NumberE132E129
CategoryAdditiveArtificial Color
SeverityModerate Risk (6/10)High Risk (9/10)
FDA StatusFDA permanently listed FD&C Blue No. 2 in 1983 (21 CFR 74.102). Approved for food, drugs, and cosmetics. The FDA reviewe…FDA-approved since 1971. Currently under review as part of the 2025-2026 FDA food dye reassessment. Listed on the FDA's …
EFSA StatusEFSA re-evaluated indigo carmine (E 132) in 2014. Established an ADI of 5 mg/kg body weight/day. EFSA noted that dietary…EFSA re-evaluated in 2009 and maintained approval with an ADI of 7 mg/kg body weight/day. EU requires warning label: 'ma…
Banned In—EU (requires warning label) Norway Austria Finland France
Products Found154907

Key Differences

Health Concerns Comparison

Blue 2 (Indigo Carmine)

Red 40 (Allura Red AC)

📱 This is exactly what CheckIt was built for.

Download Now — It's Free → ★4.7 · 256+ reviews

Which Products Use Each?

154
products contain Blue 2 (Indigo Carmine)
907
products contain Red 40 (Allura Red AC)

⚖️ The Verdict

Based on severity scores, Red 40 (Allura Red AC) (9/10) poses a higher risk than Blue 2 (Indigo Carmine) (6/10).

Both ingredients should be consumed mindfully. Use CheckIt AI to scan products and avoid whichever ones concern you most.

Frequently Asked Questions

Is Blue 2 (Indigo Carmine) or Red 40 (Allura Red AC) worse?
Red 40 (Allura Red AC) has a higher severity score (9/10) compared to Blue 2 (Indigo Carmine) (6/10), making it the more concerning ingredient based on current regulatory and scientific data.
What is the difference between Blue 2 (Indigo Carmine) and Red 40 (Allura Red AC)?
Blue 2 (Indigo Carmine) is a additive, while Red 40 (Allura Red AC) is a artificial color. They serve different functions in food products.
Are Blue 2 (Indigo Carmine) and Red 40 (Allura Red AC) banned?
Blue 2 (Indigo Carmine) is not currently banned in any major market. Red 40 (Allura Red AC) is banned in EU (requires warning label), Norway, Austria, Finland, France.
How can I avoid both Blue 2 (Indigo Carmine) and Red 40 (Allura Red AC)?
Download CheckIt AI and scan any product's barcode or ingredient label. The app will flag both Blue 2 (Indigo Carmine) and Red 40 (Allura Red AC) and suggest safer alternatives.
📬

Stay Updated on Ingredient Safety

Get free weekly updates on banned ingredients, new research findings, and FDA actions — before they hit the news.

Trusted by 27,000+ app users. No spam. Unsubscribe anytime.

📬

Get Your Free Weekly Clean Food Report

Every Friday: the 5 worst products we found this week, FDA recall alerts, and the cleanest new finds at your grocery store.

Trusted by 27,000+ app users. No spam. Unsubscribe anytime.

Scan Products for Blue 2 (Indigo Carmine) or Red 40 (Allura Red AC)

Point your camera at any food label and instantly know if it contains either ingredient.

Download CheckIt AI — Scan Free →

Related Pages

Related Comparisons

Red 40 (Allura Red AC) vs Yellow 5 (Tartrazine)Red 40 (Allura Red AC) vs Yellow 6 (Sunset Yellow FCF)Red 40 (Allura Red AC) vs Red 3 (Erythrosine)Red 40 (Allura Red AC) vs Blue 1 (Brilliant Blue FCF)Red 40 (Allura Red AC) vs Caramel Color (4-MEI)Red 40 (Allura Red AC) vs Titanium DioxideRed 40 (Allura Red AC) vs AnnattoRed 40 (Allura Red AC) vs Aspartame
Blue 2 (Indigo Carmine) Deep Dive Red 40 (Allura Red AC) Deep Dive All 180 Comparisons All Ingredients Ingredients Banned in Europe Scoring Methodology

⚕️ This comparison is for educational purposes only. It is not medical advice. Consult a healthcare professional for personalized dietary guidance.

CheckIt AI
CheckIt AI
★★★★★ 4.7 · 256+ reviews

Join 50,000+ families scanning smarter.

1,328 products scanned today · Point your camera at any label

Get the Free App →

Free forever · No credit card · Works on iPhone & Android

Scanner Apps

Gluten Scanner AppDairy Scanner AppSeed Oil Scanner AppPeanut Allergy Scanner AppADHD Food Scanner AppIBS Food Scanner AppPregnancy Food Scanner AppCarnivore Diet Scanner AppKeto Scanner AppPaleo Scanner AppVegan Scanner AppCeliac Scanner AppMigraine Food Scanner AppKidney Diet Scanner AppCrohn's Food Scanner AppThyroid Scanner AppPCOS Food Scanner AppGout Food Scanner AppEczema Food Scanner AppToddler Food Scanner AppHeart Health Scanner AppAthlete Nutrition Scanner AppAcne Food Scanner AppFODMAP Scanner AppAIP Scanner AppMold Toxin Scanner AppHistamine Scanner AppOxalate Scanner AppNightshade Scanner AppSoy Scanner AppCorn Scanner AppEgg Allergy Scanner AppTree Nut Scanner AppShellfish Allergy Scanner AppSulfite Scanner AppSalicylate Scanner AppLectin Scanner AppSugar-Free Scanner AppLow Sodium Scanner AppMediterranean Diet Scanner AppWhole30 Scanner AppDiabetic Food Scanner AppColitis Food Scanner AppIC Food Scanner AppLupus Food Scanner AppHashimoto's Scanner AppEndometriosis Food Scanner AppAutoimmune Food Scanner AppBaby Formula Scanner AppPet Food Scanner AppSenior Nutrition Scanner AppOzempic Food Scanner AppWegovy Food Scanner AppMounjaro Food Scanner AppUltra-Processed Food ScannerHalal Food Scanner AppKosher Food Scanner AppAnti-Inflammatory Scanner AppCandida Diet Scanner AppSIBO Food Scanner AppLeaky Gut Scanner AppCholesterol Food Scanner AppBlood Pressure Scanner AppWeight Loss Food Scanner AppPesticide Food Scanner AppHeavy Metal Scanner AppPFAS Food Scanner AppBreastfeeding Food Scanner AppAutism Food Scanner AppFertility Food Scanner AppGAPS Diet Scanner AppElimination Diet Scanner AppLow Carb Scanner AppNanny Food Scanner AppGrocery Store Scanner AppFood Allergy Scanner AppDye-Free Food Scanner AppMuscle Building Scanner AppMarathon Runner Scanner AppKids Food Scanner AppFood Sensitivity Scanner AppClean Label Scanner AppFSA/HSA Food Scanner AppWhole Food Scanner AppDog Food Scanner AppCat Food Scanner App

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 SooseeCheckIt vs NoomYuka vs EWGYuka vs Fooducate

Product Exposés

What's Really In Your Food?What's Really In Lunchables?What's Really In Hot Cheetos?What's Really In Gatorade?What's Really In Pop-Tarts?What's Really In Mountain Dew?What's Really In Doritos?What's Really In Goldfish?What's Really In Oreos?What's Really In Lucky Charms?What's Really In Takis?

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 SnacksWalmart 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 KrogerAll Recipe GuidesGF + 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 ReportKraft Heinz Safety ReportFrito-Lay Safety ReportHain Celestial Safety ReportConagra Safety ReportMondelēz Safety ReportCampbell's Safety ReportDanone 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

Additive-Free Product Guides

All Additive-Free GuidesWithout Red 40Without Yellow 5Without CarrageenanWithout MSGWithout AspartameWithout HFCSWithout BHAWithout TBHQWithout Sodium BenzoateWithout Titanium DioxideWithout SucraloseWithout Artificial Colors

Influencer-Inspired Grocery Lists

All Inspired ListsBobby Parrish InspiredDr. Hyman InspiredFood Babe InspiredDr. Berg InspiredCalley Means InspiredDr. Gundry InspiredThomas DeLauer InspiredDr. Ken Berry InspiredJoe Rogan Diet ListHuberman Lab Food ListDr. Casey Means ListRFK Jr. MAHA Food ListDr. Rhonda Patrick ListEmily Mariko Meal PrepJamie Oliver Clean EatingFit Men Cook ListKids Clean EatsClean Eating ListAnti-Inflammatory ListSeed Oil Free ListDye-Free Kids' FoodsWhole Food SnacksNo Artificial IngredientsGut Health FoodsPregnancy-Safe GroceriesToddler-Safe SnacksKeto No Seed Oils

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

Healthy Store Hauls

All Store HaulsWalmart HaulCostco HaulTarget HaulTrader Joe's HaulWhole Foods HaulKroger HaulAldi Haul

Store Shopping Guides

All Store GuidesSeed Oil-Free Snacks at WalmartKeto Snacks at CostcoGF Cereal at Trader Joe'sClean Label Snacks at Whole FoodsSeed Oil-Free Snacks at TargetVegan Drinks at KrogerDye-Free Snacks at ALDIGF Bread at WalmartGF Snacks at CostcoSeed Oil-Free at Trader Joe'sDye-Free Cereal at Walmart

Is It Healthy?

Browse All ProductsHealthier Swap FinderStore Report CardsIngredient EncyclopediaBanned IngredientsWhat's Really In Your Food

UPC Barcode Lookup

Barcode Lookup Tool

Worst Product of the Week

All Weekly ReportsJanuary 2026 Week 1January 2026 Week 2February 2026 Week 1February 2026 Week 2March 2026 Week 1March 2026 Week 2

School Lunch Guides

All School Lunch GuidesDye-Free School LunchNut-Free School LunchSchool Lunch Without Red 40School Lunch Without HFCSGluten-Free School LunchDairy-Free School LunchNo Preservatives LunchClean Label School LunchLow-Sugar School LunchSeed Oil-Free Lunch

Checkit Vision SDK

Checkit Vision SDKComputer Vision APIOn-Device Computer VisionCloud vs On-DeviceBuild a Food Scanner AppAWS Rekognition AlternativeGoogle Vision AlternativeEnterprise

Vision Integration Guides

React Native SDKFlutter SDKSwift SDKKotlin SDKPython SDKWeb / WASMUnity SDK.NET MAUI SDK

Vision Industry Solutions

Warehouse AutomationManufacturing QCHealthcare ImagingRetail InventoryLogistics TrackingFood Safety

Vision Comparisons & Compliance

Cloud vs On-Device CostScandit vs Checkit VisionBuild vs Buy CV SDKHIPAA Compliant CVGDPR Edge AISOC 2 Vision SDKObject Detection TutorialBarcode Scanner Tutorial

No-Barcode Scanning

Scan Without BarcodeBarcode Scanner AlternativeGrocery ScannerCosmetic ScannerAllergen ScannerAI vs Barcode ScannerCamera Food ScannerAI Label Reader

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 FoodUPC Barcode Lookup
4.7
from 256+ ratings on the App Store
📋 Cite This Data
APACheckIt AI. (2026). "Blue 2 (Indigo Carmine) vs Red 40 (Allura Red AC) — Which Is Worse? | CheckIt AI". Climaverse PBC. Retrieved from https://getcheck.it/ingredients/blue-2-vs-red-40
MLA"Blue 2 (Indigo Carmine) vs Red 40 (Allura Red AC) — Which Is Worse? | CheckIt AI." CheckIt AI, Climaverse PBC, 2026-04-17. https://getcheck.it/ingredients/blue-2-vs-red-40.
HTML Embed<a href="https://getcheck.it/ingredients/blue-2-vs-red-40">Blue 2 (Indigo Carmine) vs Red 40 (Allura Red AC) — Which Is Worse? | CheckIt AI — CheckIt AI</a>
BibTeX@misc{checkit2026ingredientsblue2vsred40, title = {Blue 2 (Indigo Carmine) vs Red 40 (Allura Red AC) — Which Is Worse? | CheckIt AI}, author = {CheckIt AI}, year = {2026}, publisher = {Climaverse PBC}, url = {https://getcheck.it/ingredients/blue-2-vs-red-40}, note = {Retrieved 2026-04-17} }