What Is Green 3 (Fast Green FCF)? Safety, Risks & Alternatives

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E-Number	E143
FDA Status	FDA permanently listed FD&C Green No. 3 in 1982 (21 CFR 74.203). Approved for food, drugs, and cosmetics. It is the leas…
EFSA Status	EFSA re-evaluated Fast Green FCF (E 143) in 2014. Could not establish a formal ADI due to insufficient toxicological dat…
ADI	Temporary ADI of 25 mg/kg body weight/day (EFSA — pending additional data)
Severity	Moderate Risk (6/10)

What Is Green 3 (Fast Green FCF)?

A synthetic triarylmethane dye that produces a sea-green color. It is the only green dye certified by the FDA for use in food, drugs, and cosmetics. Green 3 is relatively rare in foods compared to other synthetic dyes — most green-colored foods achieve their color by mixing Blue 1 with Yellow 5 instead. It is also used in biological research as a protein stain.

Mechanism of Action

Green 3 absorbs light in the red spectrum (625 nm), producing a green appearance. It is a triarylmethane dye structurally related to Blue 1. Poorly absorbed from the GI tract — approximately 95% is excreted unchanged in feces. Early animal studies reported tumors at the injection site (sarcomas) when Green 3 was administered subcutaneously, but oral studies showed no carcinogenic effects. EFSA noted limited available toxicological data.

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Why People Avoid Green 3 (Fast Green FCF)

Regulatory Status

🇺🇸 FDA

FDA permanently listed FD&C Green No. 3 in 1982 (21 CFR 74.203). Approved for food, drugs, and cosmetics. It is the least-used of the FDA-certified color additives due to cost and the availability of blue-yellow blends as alternatives.

🇪🇺 EFSA

EFSA re-evaluated Fast Green FCF (E 143) in 2014. Could not establish a formal ADI due to insufficient toxicological data. Set a temporary ADI of 25 mg/kg body weight/day based on available data but called for additional genotoxicity and reproductive toxicity studies. Not widely used in the EU.

Regulatory Timeline

Products Containing Green 3 (Fast Green FCF) (1 found in our database)

Product

Brand

Score

FREEZE POPS

H E Butt Grocery Company

24/100

Safer Alternatives

Scientific Sources

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Frequently Asked Questions

What is Green 3 (Fast Green FCF)?: A synthetic triarylmethane dye that produces a sea-green color. It is the only green dye certified by the FDA for use in food, drugs, and cosmetics. Green 3 is relatively rare in foods compared to other synthetic dyes — most green-colored foods achieve their color by mixing Blue 1 with Yellow 5 instead. It is also used in biological research as a protein stain.
Is Green 3 (Fast Green FCF) safe?: Green 3 (Fast Green FCF) is FDA permanently listed FD&C Green No. 3 in 1982 (21 CFR 74.203). Approved for food, drugs, and cosme. EFSA re-evaluated Fast Green FCF (E 143) in 2014. Could not establish a formal ADI due to insufficie.
Where is Green 3 (Fast Green FCF) banned?: Green 3 (Fast Green FCF) is not currently banned in any major market according to our database.
What are alternatives to Green 3 (Fast Green FCF)?: Safer alternatives to Green 3 (Fast Green FCF) include: Spirulina extract, Chlorophyll/chlorophyllin, Matcha powder, Spinach juice concentrate.
How can I avoid Green 3 (Fast Green FCF)?: Download CheckIt AI and scan any product's barcode or ingredient label. The app will flag Green 3 (Fast Green FCF) and suggest safer alternatives.
What foods contain Green 3 (Fast Green FCF)?: Green 3 (Fast Green FCF) is commonly found in: Green-colored candies, Mint-flavored desserts, Canned vegetables (for color enhancement), Beverages, Ice cream, Biological protein stains. Our database has flagged it in 1 products.
What are the side effects of Green 3 (Fast Green FCF)?: Concerns about Green 3 (Fast Green FCF) include: Petroleum-derived synthetic dye; EFSA could not establish a proper ADI due to lack of safety data; Early studies showed tumors when injected (not orally consumed).
Is Green 3 (Fast Green FCF) natural or artificial?: Green 3 (Fast Green FCF): Green 3 absorbs light in the red spectrum (625 nm), producing a green appearance. It is a triarylmethane dye structurally related to Blue 1. Poorly ab.

⚕️ This page provides ingredient information for educational purposes only. It is not medical advice. Consult a healthcare professional for personalized dietary guidance. This information is for educational purposes only. Consult a healthcare professional for personalized dietary advice.

📋 Cite This Data

APA

CheckIt AI. (2026). "What Is Green 3 (Fast Green FCF)? Safety, Risks & Alternatives | CheckIt AI". Climaverse PBC. Retrieved from https://getcheck.it/ingredients/green-3

MLA

"What Is Green 3 (Fast Green FCF)? Safety, Risks & Alternatives | CheckIt AI." CheckIt AI, Climaverse PBC, 2026-04-17. https://getcheck.it/ingredients/green-3.

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<a href="https://getcheck.it/ingredients/green-3">What Is Green 3 (Fast Green FCF)? Safety, Risks & Alternatives | CheckIt AI — CheckIt AI</a>

BibTeX

@misc{checkit2026ingredientsgreen3,
  title = {What Is Green 3 (Fast Green FCF)? Safety, Risks & Alternatives | CheckIt AI},
  author = {CheckIt AI},
  year = {2026},
  publisher = {Climaverse PBC},
  url = {https://getcheck.it/ingredients/green-3},
  note = {Retrieved 2026-04-17}
}

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