Limonene
D-limonene is GRAS as a flavoring substance under 21 CFR 182.60 and is a natural component of citrus oils. EFSA has reviewed limonene-containing flavoring substances and found no safety concern at intended use levels.
What it is
A naturally occurring monoterpene (d-limonene) found in citrus peel oils; used as a flavor and fragrance compound.
Flavoring agent providing citrus aroma; also occurs naturally in citrus juices and oils.
Why it's flagged
- potential skin sensitizer in oxidized form (cosmetic context)
What regulators actually say
"Synthetic flavoring substances and adjuvants... d-Limonene... are generally recognized as safe for their intended use."
"The Panel concluded that the flavouring substances in this group do not give rise to safety concerns at their levels of dietary intake."
Regulatory status
United States — FDA
GRAS as a synthetic flavoring substance under 21 CFR 182.60
European Union — EFSA
Flavouring Group Evaluation found no safety concern at intended use levels
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