Green Dye 3 vs Homosalate: which is worse?
Quick answer: Green Dye 3 carries the heavier risk profile. Green Dye 3 is — in the EU and — in the US; Homosalate is restricted in the EU and allowed in the US.
| Property | Green Dye 3 | Homosalate |
|---|---|---|
| EU status | — | Restricted |
| US status | — | Allowed |
| Risk level | — | medium |
| Banned in | European Union (not approved as food additive), United Kingdom | — |
| Restricted in | Canada (limited permitted use) | European Union |
| Category | additive | uv filter |
| Where it hides | — | sunscreen, SPF moisturizer, SPF foundation |
What is Green Dye 3?
Green Dye 3 (Fast Green FCF) is a synthetic blue-green triarylmethane dye similar to Blue Dye 1. It produces a sea-green color and is among the least used certified US food dyes. Its chemical formula is C37H34N2Na2O10S3.
What is Homosalate?
Homosalate is an organic UV filter that absorbs UVB radiation.
Documented risks
Green Dye 3: Green Dye 3 has a limited safety database compared to other certified food dyes, partly due to its infrequent use. A 1981 NTP bioassay (Technical Report 27) found statistically significant increases in urinary bladder tumors in male mice at high doses. The FDA reviewed these findings and, as with Blue 2, concluded the doses far exceeded typical human dietary exposure. Green 3 is not approved in the EU — under the EU's positive list system, only specifically approved additives may be used. Since Green 3 is not on the positive list, it is effectively banned. EFSA has not conducted a formal re-evaluation because it is not authorized for EU use. Hypersensitivity reactions have been reported. Like other synthetic triarylmethane dyes, Green 3 may cause contact dermatitis. The FDA's April 2025 phase-out announcement includes Green 3 among the eight petroleum-based synthetic dyes to be removed from the US food supply. Its already limited use means this phase-out has minimal market impact compared to Red 40 or Yellow 5.
Homosalate: A suspected endocrine disruptor; the EU limits it to 7.34% in face products (2025), well below typical US concentrations.
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