Glossary
An important safety-focused overview of bergamot essential oil (Citrus bergamia) in skincare, covering its documented phototoxic risk from bergaptene (furanocoumarin), the development of bergaptene-free (FCF) bergamot, and its legitimate therapeutic uses in aromatherapy and properly formulated skincare.
Standard bergamot essential oil contains bergaptene (also called bergapten or 5-methoxypsoralen), a furanocoumarin compound that dramatically increases skin sensitivity to UV radiation. When bergamot oil is applied to skin and that skin is subsequently exposed to sunlight, severe burns, blistering, and lasting hyperpigmentation can result.
This phototoxic reaction is not a minor irritation. Historical cases include severe burns from bergamot-containing suntan oils (popular in the 1970s-80s) and cosmetic disfigurement from perfume application followed by sun exposure. The IFRA (International Fragrance Association) restricts bergamot oil concentration in leave-on products to 0.4 percent.
FCF (furanocoumarin-free) bergamot essential oil has had the bergaptene removed through a rectification process, eliminating the phototoxic risk while retaining the characteristic elegant, fresh, complex citrus-floral scent that makes bergamot one of perfumery's most valued materials.
For skincare use, FCF bergamot is safe in leave-on products at standard dilutions. Standard bergamot is safe in rinse-off products (where skin contact is brief) and in products designed for evening use where no subsequent sun exposure will occur.
FCF (furanocoumarin-free) bergamot is safe for skin at standard dilutions. Standard bergamot oil causes phototoxic burns if applied skin is exposed to UV. Always verify that bergamot oil in leave-on products is FCF/bergaptene-free. If in doubt, use bergamot only in evening products or rinse-off formulations.
Bergaptene (5-methoxypsoralen) is a furanocoumarin compound that intercalates with DNA and, when activated by UV radiation, causes cross-linking that damages skin cells. This results in inflammation, blistering, and hyperpigmentation. It is the compound responsible for bergamot oil's phototoxicity.
No. The bergamot flavoring in Earl Grey tea is consumed internally at very low concentrations and does not cause skin phototoxicity. The phototoxic reaction requires direct topical application of bergaptene-containing oil followed by UV exposure.
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