Carrageenan (E407) is a polysaccharide from red seaweed used to thicken and stabilize foods. In fast food, it helps keep shakes, soft-serve mixes, sauces, and some plant-based dairy products creamy and uniform. Major regulators permit food-grade carrageenan, with EFSA setting a temporary ADI of 0–75 mg/kg bw/day. In 2024, a large prospective cohort reported an association between higher carrageenan intake and increased breast cancer risk; participants’ intakes were below the ADI, but the signal warrants caution. The EU prohibits carrageenan in infant formula as a precaution.

Major regulators still allow food-grade carrageenan, but debate continues around gastrointestinal irritation and newer observational data. PRūF lists it as Low / Limited Concern rather than a top-tier hazard.

Low / Limited Concern

What is carrageenan? Safety, uses, and current evidence

Thickener/Stabilizer

Quick answer

What is carrageenan? A seaweed-derived thickener and stabilizer used to keep shakes, sauces, and dairy-style foods smooth.

Why do some people avoid it? Most regulators still allow food-grade carrageenan, but some shoppers avoid it because of ongoing debate around GI irritation and newer long-term exposure research.

CarcinogenGastrointestinalInflammation

Description

Carrageenan (E407) is a seaweed-derived thickener used to keep foods smooth and stable. It shows up in shakes, soft-serve mixes, sauces, and some plant-based dairy products. Major regulators still permit food-grade carrageenan, though they continue to review newer evidence on gastrointestinal effects and long-term exposure. That leaves carrageenan in a gray zone for cautious shoppers: widely allowed, but still debated.

Learn More Dossier

Aliases / Common Names: Carrageenin; Irish moss extract; Chondrus extract; E407 (carrageenan); E407a (processed Eucheuma seaweed). Regulatory Status & Exposure: FDA permits carrageenan as a direct food additive under 21 CFR §172.620 for stabilizing/thickening uses. EFSA’s 2018 re-evaluation established a temporary group ADI of 0–75 mg/kg bw/day for E407/E407a, citing data gaps to be addressed. JECFA concluded use in infant formula up to 1000 mg/L is “not of concern”. The EU prohibits carrageenan in infant formula (Reg. 2016/127) on precautionary grounds, though it is allowed in many other foods. In the 2024 cohort, no participants exceeded the carrageenan ADI. Technical Evidence: Carrageenan functions as a sulfated galactan that binds water and proteins, improving texture. Debate centers on gastrointestinal irritation and inflammation at high exposures or under specific conditions; food-grade carrageenan is distinct from degraded carrageenan (poligeenan), which is not permitted in food. The 2024 NutriNet-Santé cohort observed higher breast cancer risk with higher carrageenan intake (HR 1.28), while acknowledging observational limitations and potential exposure misclassification; authors called for replication and mechanistic follow-up. EFSA judged carcinogenicity/genotoxicity concerns for food-grade carrageenan to be low but set a temporary ADI pending more data. Fast-Food Context: Carrageenan is used at levels needed for its technical effect (GMP) to stabilize milkshakes/soft-serve, keep particulates suspended in chocolate/strawberry drinks, and improve body in sauces and some processed items. It is typically one component among several gums/emulsifiers in formulations. Sensitive Populations / Notes: Infants (EU prohibition in formula). Individuals with inflammatory bowel conditions may wish to avoid carrageenan due to potential GI sensitivity, though major authorities still permit it in general foods.

Regulatory status

United States

Allowed Food for human consumption where permitted; generally used under GMP, except where standards of identity do not provide for such use. Basis: 21 CFR 172.620 Source

United States

Allowed Chondrus extract (carrageenin) GRAS under GMP; overlaps with carrageenan inventory synonym set. Basis: 21 CFR 182.7255 Source

European Union

Allowed Broad authorization (often quantum satis); infant/young child categories have specific provisions; follow-on formula (13.1.2) permits E 407 at 300 mg/L. Basis: Efsa Opinion Source

United Kingdom

Allowed E-number additive listing includes E 407 carrageenan and E 407a processed eucheuma seaweed. Basis: Other Source

Canada

Allowed Permitted with specific maxima depending on food category (including infant formula subcategories). Basis: Other Source

Registry review date: 2026-02-19

State policy updates

California (US)

Not Applicable Not regulated by this act (AB 418 / Health and Safety Code section added by AB 418). Effective: 2027-01-01 Compliance: 2027-01-01 Source

Policy timeline

2023-10-07 — AB 418 chaptered (enacted); carrageenan not listed (California (US))

Research Evidence Snapshot

ACUTE SENSITIVITY HAZARD

Confidence: Medium

Low

EFSA review did not identify case reports of significant allergic/anaphylactic reactions after ingestion; acute GI sensitivity remains plausible but not well quantified.

CHRONIC HEALTH EVIDENCE DIRECTION

Confidence: Low

Mixed/heterogeneous

Regulatory reviews generally support safety under authorized use; conflicting small UC trials and observational cancer associations prevent a single-direction conclusion.

EVIDENCE STRENGTH

Confidence: Medium

Limited

Extensive mechanistic/animal evidence is sensitive to molecular weight and exposure context; human evidence exists but is small and heterogeneous.

REGULATORY POSTURE (U.S.)

Confidence: High

Authorized/Permitted

Listed in FDA inventory and CFR as a permitted direct food additive (21 CFR 172.620) with GRAS-related listing for chondrus extract (21 CFR 182.7255).

REGULATORY DIVERGENCE

Confidence: High

Moderate

Broad permission across jurisdictions; divergence appears mainly in infant formula category permissions and specification emphasis on low–molecular weight fraction control.

HEALTH-BASED GUIDANCE AVAILABILITY

Confidence: Medium

Established

EFSA maintains a temporary numeric ADI concept; JECFA uses ADI not specified (guidance exists but varies by authority).

EXPOSURE CERTAINTY

Confidence: High

Low

EU exposure modeling exists; U.S. restaurant/fast food exposure is poorly characterized publicly and concentrations are typically proprietary.

DATA RECENCY & STABILITY

Confidence: Medium

Evolving

Regulatory permissions are stable, but key scientific questions remain active (temporary ADI, analytical/specification discussion, new epidemiology).

Found in these Restaurants

We found this ingredient in menu items at the following chains:

Dunkin'

IHOP

Taco Bell

Starbucks

McDonald's

Panera Bread

Wendy's

Burger King

Arby's

Chick-fil-A

In-N-Out Burger

Panda Express

Kentucky Fried Chicken

2 items ›

Methodology

We assign the Low / Limited Concern tier using published research, regulatory guidance, and PRūF’s additive taxonomy. Restaurant usage is derived from public ingredient disclosures and mapped to menu items where this additive appears. References last reviewed 2026-03-07.

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Regulatory context

Learn how this additive is treated across different regulatory frameworks and why mixture effects can matter.

Regulatory frameworks overview Read analysis →

Scientific Sources & References

About this Audit

Data sourced from publicly available nutrition guides and ingredient lists as of 2026-03-04. Percentages represent the frequency of an ingredient's appearance across standard menu items, not the quantity within a specific item. Regional availability and supplier formulations may vary.

PRūF is an independent educational tool and is not affiliated with, endorsed by, or connected to any restaurant chain mentioned. All trademarks belong to their respective owners.

What is carrageenan? Safety, uses, and current evidence

Quick answer

Description

Learn More Dossier

Regulatory status

State policy updates

Policy timeline

Research Evidence Snapshot

Found in these Restaurants

Methodology

Related questions and pages

Regulatory context

Scientific Sources & References

About this Audit

Scan your food for additives of concern