Bergamot essential oil: the scent of Earl Grey and the strictest sun limit

Bergamot smells floral and is the strictest citrus in the sun. How many drops are safe, what FCF is and how to blend it.

In brief: Bergamot oil pressed from the peel is the most strongly phototoxic citrus: it contains bergapten, and IFRA permits it on sun-exposed skin only up to 0.4%, that is, 2 drops per 30 ml. At a higher dose, protect the skin from the sun for 12 hours. There is no restriction in a diffuser or in the FCF version.

Latin name	Citrus bergamia (syn. Citrus aurantium subsp. bergamia)
Extraction	cold pressing of the peel; at Pěstík from Calabria, Italy
Main components	limonene around 30–45%, linalyl acetate 20–30%, linalool 5–15%, bergapten in the non-volatile fraction
Limit on sun-exposed skin	0.4% (IFRA), i.e. 2 drops per 30 ml, 4 drops per 50 ml
Bergamot FCF	free of furocoumarins, not phototoxic (Pěstík does not stock it)
Shelf life	roughly 12 months from opening, in the cool

Bergamot is a citrus that smells different from the others. Instead of pure juice it has a floral, almost lavender-like note, which perfumers love and which you know from Earl Grey tea. In a diffuser it is one of the most pleasant evening scents. On the skin, however, it is the most cautionary of all citrus oils, because pressed bergamot burns more in the sun than lemon or lime.

This article explains why that is, how to dilute bergamot in drops, what the FCF version is and how to blend it with other oils from our range. It is not medical advice.

Why bergamot smells floral

Most citrus oils are 85–95% limonene. Bergamot has only roughly a third to a half of that, and a large part of the oil is made up of linalyl acetate and linalool, the same substances you find in lavender. The ratio of linalool to linalyl acetate is even used as a measure of the quality of bergamot oil. The result is a scent on the border between citrus and flowers, fresh but not sour.

Bergamot fruits are not normally eaten as fruit; they are sour and bitter and are grown almost exclusively for the oil, mainly in Italian Calabria. That is also where the bergamot from Pěstík comes from.

Phototoxicity: why only 0.4%

Besides the aromatic fraction, pressed oil contains several per cent of non-volatile substances. Among them is bergapten (5-methoxypsoralen), a furocoumarin that reacts on the skin with UVA radiation. Reactions described after bergamot range from redness through blisters to dark patches that last for months, and in the sun bergapten is also considered potentially photocarcinogenic. That is why the IFRA limit for bergamot is the lowest of all citrus oils.

Amount of carrier oil	Bergamot at the 0.4% limit	Note
10 ml	less than 1 drop	1 drop = 0.5%, so already above the limit
30 ml	2 drops (0.33%)	massage oil for exposed areas
50 ml	4 drops (0.4%)	body oil
100 ml	8 drops	for body lotion

We count 1 ml ≈ 20 drops. If you want more bergamot (in a roll-on for the wrist or in an evening massage), feel free, but protect the treated skin from the sun and from sunbeds for 12 hours. The safest approach is to apply the blend in the evening and to areas that will stay covered the next day.

Bergamot FCF

The abbreviation FCF stands for "furocoumarin free". Distillation removes bergapten and other furocoumarins from the oil, leaving the aromatic part, which is not phototoxic. For daytime cosmetics it is the safest choice. Pěstík offers classic pressed bergamot, not FCF, so the limits above apply to it.

Blends with other citrus oils

Bergamot uses up the limit fastest. When you combine it with lime, lemon or grapefruit, their phototoxicity adds up: work out what percentage of its own limit each oil makes up, and keep the total within 100. For example, 1 drop of bergamot per 30 ml (0.17% = 42% of the limit) and 2 drops of lime (0.33% = 48% of the limit) give 90%. With orange or mandarin nothing adds up. We write about lemon in detail in the article lemon oil and beware of the sun.

Where to use bergamot without counting

In the air. In a diffuser or oil burner phototoxicity plays no role. For a small room 2–4 drops, for a living room 4–6, for an oil burner 3–5 drops. More can be found in the article how many drops of essential oil for a diffuser.

Blends with bergamot

Evening after work (diffuser)

3 drops of bergamot and 2 drops of lavender. Both oils share linalool, so the blend is harmonious and gentle. More evening combinations are in the article essential oils for relaxation and sleep.

Earl Grey in the living room (oil burner)

3 drops of bergamot, 1 drop of frankincense, 1 drop of Himalayan cedar. A dry, tea-like scent with a woody base.

Floral (diffuser)

2 drops of bergamot, 1 drop of ylang ylang, 1 drop of geranium. Bergamot "lights up" the heavy flowers.

Evening massage oil (1.5%)

Pour 30 ml of jojoba oil into a bottle.
Add 2 drops of bergamot (0.33%, below the limit).
Add 5 drops of lavender and 2 drops of Himalayan cedar, 9 drops in total.
Mix by turning the bottle over and label it with the date.
Test on the forearm and wait 24 hours. Use within 2–3 months.

Traditional use and research

Bergamot is one of the basic raw materials of perfumery. In aromatherapy it is traditionally used in blends for relaxation and improving mood. Laboratory and small clinical studies examine its effect on anxiety and stress when inhaled, but the results are not strong enough to speak of treatment. Do not swallow the oil. The bergamot in Earl Grey tea is a food flavouring, not the essential oil from a bottle.

What to watch out for

Sun: above 0.4% on the skin, no sun or sunbed for 12 hours. Never undiluted.
Oxidation: limonene and linalool oxidise in air into substances that may cause contact allergy. Keep the bottle closed, store it in the cool (even in the fridge) and use it up in a diffuser a year after opening.
Children: citrus oils in a diffuser from 6 months, on the skin from 2 years, dilution for ages 2–6 at 0.5–1%. For children, it is better to give bergamot only in a diffuser and replace it with mandarin on the skin. The rules are in the article essential oils and children.
Pregnancy: bergamot is not among the forbidden oils; dilution up to 1% and below the sun limit.
Cats: citrus oils and linalool are harmful to them. Use a diffuser only where the cat can leave. More in the article essential oils and pets.

How to recognise a good bergamot

The label should state the Latin name Citrus bergamia, the method of extraction and the country of origin, most often Italy (Calabria). It is important to know whether it is a pressed oil or FCF, because that decides its use on the skin. The colour is greenish-yellow to yellow, the scent fresh with a floral note. An oil that smells merely like ordinary citrus is often diluted with cheaper citrus oils.

Frequently asked questions

Is bergamot oil phototoxic?

Pressed bergamot is the most strongly phototoxic of all common citrus oils, because of bergapten. IFRA permits it on skin exposed to the sun only up to 0.4%. The FCF version (free of furocoumarins) is not phototoxic.

What does bergamot FCF mean?

FCF is an abbreviation for "furocoumarin free". Bergapten and related substances are removed from the oil, so it can be used on the skin even before sun exposure. The scent is almost the same.

How many drops of bergamot per 30 ml of oil?

For skin that will go out in the sun, at most 2 drops per 30 ml (0.33%). If you apply the blend in the evening and the area stays covered, you can go higher, but the general maximum for the body is 2%, that is, 12 drops.

What should bergamot be combined with?

With lavender for the evening, with frankincense and cedar for a tea-like woody scent, with ylang ylang and geranium in floral blends. With lime or lemon carefully, as phototoxicity adds up.

What is bergamot oil used for?

Mainly in a diffuser and oil burner, where it traditionally serves to bring calm and a good mood, and in perfume and massage blends at low dilution. It is not taken internally.

Sources

Updated: 27 September 2026

Author: Jana Vránová, the editorial pen name of the Pěstík.cz team. She writes about the garden, herbs and essential oils. We take safety and dosage information from specialist literature and official sources, which we cite in every article.