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The US and international formulas are not the same— here's exactly what changed and why.
Mars USA
| Ingredient | 🇺🇸 US Version | 🌍 International | Status |
|---|---|---|---|
| Blue Dye 2 | ✅ Not present | ✅ Not present | Banned Overseas |
| Red Dye 40 | ✅ Not present | ✅ Not present | Banned Overseas |
| Yellow Dye 5 | ✅ Not present | ✅ Not present | Banned Overseas |
| Yellow Dye 6 | ✅ Not present | ✅ Not present | Banned Overseas |
The same company makes both versions — but they use different formulas depending on where the product is sold. In the EU, UK, and Canada, regulations require either banning certain additives outright or mandating warning labels (e.g., "may have an adverse effect on activity and attention in children" for certain synthetic dyes).
Rather than print warning labels, most manufacturers reformulate the product for international markets — using natural colorants like paprika extract, beetroot concentrate, or spirulina instead of petroleum-derived synthetic dyes.
The US FDA has a different standard: it deems additives "Generally Recognized as Safe" (GRAS) based on older safety data, while EFSA (the European Food Safety Authority) applies stricter precautionary principles and requires manufacturers to prove safety rather than assume it.
While M&M's use the same synthetic dyes in both the US and Canada, Canadian food regulations require more transparent labeling — listing dyes by their common names like 'Allura Red' and 'Tartrazine' rather than just 'artificial colors.' More critically, EU-market M&M's replaced all synthetic dyes with natural colorings years ago in response to the EU's mandatory behavioral-risk warning label requirement for the Southampton Six dyes. US and Canadian shoppers receive the dyed version without any warning.
Find clean brands without these ingredients — organized by category.