Red 40
Red 40: what it does in food, current safety notes, diet compatibility, and shopper guidance from IngrediCheck.
Aliases and label clues
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Overview
Red 40 is the most widely used synthetic food dye in the United States and shows up across sports drinks, candy, cereal, frosting, and snack products. It matters because it is common, not because every single use case is identical.
Diet snapshot
What It Does in Food
Red 40 is most commonly used as synthetic color additive in packaged food.
Category
Food dye
Evidence and Regulatory Summary
Red 40 remains allowed while broader petroleum-based dye phase-out efforts accelerate. That makes it a live label-reading ingredient: still common enough to matter, but far enough into the reformulation conversation that alternatives are increasingly realistic.
Diet Notes
Most shoppers tracking Red 40 care about cumulative exposure in kid-heavy product categories rather than one isolated item. It is usually a discretionary ingredient, which changes how people think about tradeoffs at the shelf.
Shopper Guidance
Red 40 is best used as a comparison cue in brightly colored product categories. If you are already choosing between similar snacks or drinks, it is an easy way to prioritize the simpler formula without needing a perfect clean-food ideology.
Related Guides
Read the connected explainers
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Mar 9, 2026 | 10 min read
Red 40 & Yellow 5: The 6 Food Dyes the FDA Is Phasing Out
Red 40, Yellow 5, and 4 other petroleum-based dyes are being removed from US food by the FDA after decades of ADHD and hyperactivity concerns. Here's what's still in your pantry.
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The FDA's 2026 Synthetic Dye Phase-Out: What It Means for Your Family
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Mar 23, 2026 | 10 min read
44 Food Additives Banned Abroad: Texas's Warning Label List
Texas passed a law requiring warning labels on foods containing 44 ingredients banned in the EU, Australia, Canada, or the UK. Here's what's on the list and why it matters.
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