ALSOFOUNDINCarrageenan (Irish moss extract)
Under DebateSeaweed-derived. The gut-inflammation fight won't die. Also listed on labels as E407, Irish moss extract.
E-number: E407
What it is
A thickener extracted from red seaweed — Irish moss and its relatives — that people have cooked with for centuries. Food makers use its refined forms to gel, thicken, and stabilize. It's the reason chocolate milk doesn't separate and vegan desserts jiggle without gelatin.
Why it's in food
It binds water and fat that would otherwise split apart, adds creamy body to low-fat and plant-based products, and does gelatin's job without animals. It's cheap texture in a bottle — which is why it turns up in everything from almond milk to deli turkey.
US vs EU status
United States
FDA-approved with no restrictions in sight — it's even allowed in US infant formula. The closest call came in 2016, when the National Organic Standards Board voted to strip it from organic food; the USDA overruled the board in 2018 and kept it. Consumer pressure then did what regulators wouldn't: many plant-milk and yogurt brands quietly removed it on their own.
European Union
Permitted as E407 — with two asterisks the US version doesn't have. The EU does not allow carrageenan in infant formula. And when Europe's food safety authority re-reviewed it in 2018, it kept the approval while conceding the safety data had gaps: it set only a temporary daily limit and demanded more studies on how much degraded carrageenan actually ends up in food.
Common products
- Almond, oat, coconut, and soy milks (some brands)
- Chocolate milk and eggnog
- Ice cream and frozen desserts
- Cottage cheese, sour cream, and whipping cream
- Deli meats and rotisserie chicken
- Vegan cheeses and meats — and US infant formula
Cleaner swaps
- Plant milks stabilized with gellan gum — or nothing (just shake the carton)
- Agar-agar for gelling at home
- Guar gum or locust bean gum versions
- Pectin-based products
Case note
Carrageenan's whole defense is that it's 'just seaweed' — and it is. But Europe won't allow that seaweed in baby formula while America does, and Europe's own regulator re-approved it while admitting the safety data was incomplete. A file that's been open this long teaches the library's second lesson: 'natural' isn't the same as 'settled.'
Read the full investigation: What Is Carrageenan and Why Is It in Baby Formula →
FAQ
Is carrageenan bad for your gut?
Unresolved — which is why this file is stamped Under Debate. Animal and lab studies, especially with the degraded form, link it to intestinal inflammation, and some people with IBS or IBD report feeling better after cutting it. Human trial evidence is thin, and regulators on both continents still call food-grade carrageenan safe. But in 2018 Europe's own reviewers conceded the data had holes and made their safety limit provisional — a rare admission that the case isn't closed.
What's the difference between carrageenan and poligeenan?
Poligeenan is carrageenan deliberately broken down by acid into small fragments — scientists literally use it to induce gut inflammation in lab animals. It is not allowed in food. The real fight is whether ordinary food-grade carrageenan partially degrades during processing or digestion: industry says not meaningfully, critics say enough to matter. That exact contamination question is what European regulators demanded more data on.
Why is carrageenan in almond milk?
It keeps the milk from separating into water and sediment so every pour looks the same. After years of consumer pushback, many brands swapped it for gellan gum or dropped stabilizers entirely — which is why some cartons now just say 'shake well.' Check the label; the same store usually carries both versions.
Is carrageenan banned anywhere?
Not broadly — it's legal across the US, EU, and UK. The telling exception is baby formula: the EU doesn't permit carrageenan in infant formula while the US does. And in 2016 the US organic board voted to remove it from organic food, only to be overruled by the USDA two years later.
How the FDA decides what reaches your table and your medicine cabinet — and how it learned to decide.
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