Lime essential oil: fresh scent and exact sun limits

Cold-pressed lime smells wonderful but burns in the sun. How many drops are safe, how to blend it with other citrus oils and four recipes.

In brief: Lime oil pressed from the peel of Citrus aurantifolia is markedly phototoxic. IFRA limits it on skin exposed to the sun to 0.7%, that is 4 drops per 30 ml of carrier oil. At a higher concentration, protect the skin from the sun for 12 hours. In a diffuser 2–4 drops are enough.

Latin name	Citrus aurantifolia (Mexican lime, key lime)
Extraction	cold pressing of the peels, BIO, at Pěstík from Italy
Main components	limonene around 50–60%, β-pinene 13–15%, γ-terpinene 8–13%, citral (neral and geranial) 3–6%
Limit on sun-exposed skin	0.7% (IFRA), i.e. 1 drop per 10 ml, 4 drops per 30 ml
Sun after a higher dose	cover the skin for 12 hours or do not use
Shelf life	roughly 12 months from opening, kept cool

Lime smells greener and sharper than lemon, with a slightly bitter, "cocktail" note. In a diffuser it is one of the freshest oils you know. On the skin, however, you have to handle it more carefully than orange or mandarin, because pressed lime is among the strongly phototoxic oils.

Below you will find the exact limits in drops, the difference between pressed and distilled oil, four blends with oils we have in stock, and how to combine lime with other citrus oils so that the blend does not exceed the safe limit. This is not medical advice.

Pressed or distilled lime

Lime oil is made in two ways, and they differ in scent and in safety.

	Pressed (cold)	Distilled
Scent	like freshly grated peel, juicy, green	sharper, "lemonade-like", less fruity
Furocoumarins	yes, bergapten and others	practically none, they are non-volatile and do not pass into the distillate
Phototoxicity	yes, IFRA max. 0.7%	no
Oil from Pěstík	K06952, pressed	we do not sell it

So if you are mixing a body oil for summer with lime, bear in mind that the lime oil from Pěstík is pressed and the limits below apply to it.

Phototoxicity in numbers

Furocoumarins in the pressed oil react on the skin with UVA radiation. The result can be redness, blisters and dark patches in the shape of drops and streaks that last for months. The reaction can appear if sun, or radiation from mountain sun or a solarium, hits the skin within 12 hours of application. Clothing lets some UVA through; it is more reliable not to put the oil on exposed areas at all.

Amount of carrier oil	Drops of lime at the 0.7% limit	Remark
10 ml (roll-on)	1 drop (0.5%)	more will not fit into 10 ml
30 ml	4 drops (0.67%)	usual massage dose
50 ml	7 drops (0.7%)	body oil
100 ml	14 drops	for body lotion

We count 1 ml ≈ 20 drops. If you want more lime, for example 2% for a back massage in winter, by all means use the blend, but do not expose the treated area to the sun for 12 hours. The simplest is to apply it in the evening.

Blending with other citrus oils

Phototoxic oils add up. IFRA recommends calculating what percentage of its own limit each oil makes up and keeping the sum within 100. Per 30 ml: 2 drops of lime (0.33% = about 48% of the limit) and 3 drops of lemon (0.5% = 25% of the limit) give 73%, which passes. Orange and mandarin are not counted, as they are not phototoxic. More about lemon in the article lemon oil: use and beware of the sun.

Where lime works best

Diffuser and aroma lamp

Here you need not deal with phototoxicity. For a small room 2–4 drops, for a living room 4–6, for an aroma lamp 3–5. A detailed overview can be found in the article how many drops to put in a diffuser and aroma lamp. Lime is stronger than orange, so start at the lower end.

Cleaning

Like other citrus oils it dissolves grease and adhesives. 2–3 drops on a cloth for sticker residue; for a spray bottle with 250 ml of water and a teaspoon of washing-up liquid, 15 drops. Try it on a hidden spot, as citrus oils can attack varnish and some plastics.

Bath

3 drops mixed into a spoonful of carrier oil or cream. In the bath the oil spreads and dilutes sufficiently, but an evening bath is safer than a morning one before going out.

Blends with lime

Mojito (diffuser)

3 drops of lime and 1 drop of peppermint. The most popular summer combination. Peppermint is not for children under 6.

After the rain (diffuser)

2 drops of lime, 2 drops of silver fir, 1 drop of rosemary. A fresh forest with citrus, good for airing out after cooking. Both conifers and citrus oils harm cats.

Green lavender (aroma lamp)

3 drops of lime and 2 drops of lavender. Lavender takes the sharpness off the lime and the blend is also suitable for the evening.

Summer body oil, safe for the sun

Pour 30 ml of jojoba oil into a bottle.
Add 4 drops of lime (at the 0.7% limit).
Complete with 4 drops of lavender and 2 drops of Himalayan cedar, 10 drops in total (around 1.7%).
Mix and label with the date.
Patch test on the forearm, wait 24 hours. Use up within 2–3 months.

Traditional use and research

Lime is traditionally used for refreshment and invigoration, in perfumery and in the kitchen mainly as a flavour and scent to "get going". Laboratory studies describe antioxidant and antimicrobial activity of lime oil in vitro and in animals; in humans this is a little-explored area. Do not swallow the oil or add it to drinks, even though it smells like a cocktail.

Safety away from the sun

Oxidation: limonene and pinenes oxidise into substances that can cause contact allergy. Close the bottle well, store it in a cool place and, a year after opening, use up what remains in the diffuser.
Citral: lime has only a few per cent of it, yet for sensitive skin start at 1% and do a patch test.
Children: in a diffuser from 6 months, on the skin from 2 years of age and always below the phototoxicity limit. The rules by age are in the article essential oils and children.
Pregnancy: lime is not among the oils to avoid; keep dilution within 1% and below the 0.7% limit for the sun.
Cats: they do not tolerate citrus. Run the diffuser only where the cat can leave, and never put oil on fur. More in the article essential oils and pets.

How to recognise a quality lime oil

Look for the Latin name Citrus aurantifolia (or Citrus latifolia for Persian lime), the method of extraction and the country of origin. The statement "pressed" or "distilled" is essential for lime, because it determines phototoxicity. Pressed oil is greenish to pale yellow and smells like fresh peel; distilled oil is clear and sharper.

Frequently asked questions

Is lime oil phototoxic?

The pressed one is, and markedly. IFRA permits it on sun-exposed skin only up to 0.7%, that is 4 drops per 30 ml. Distilled lime oil is not phototoxic.

How long should I stay out of the sun after lime oil?

If you have used more than 0.7%, protect the skin from the sun and the solarium for at least 12 hours. The simplest is to apply the blend in the evening or on areas that will stay covered.

How many drops of lime in a diffuser?

For a small room 2–4 drops, for a living room 4–6 drops. Lime is more pronounced than orange, so start at the lower end.

What should lime oil be combined with?

With peppermint for a "mojito", with fir and rosemary for a fresh forest, with lavender and cedar for a body oil. With lemon and bergamot carefully, because their phototoxicity adds up.

Can I add lime oil to a drink?

No. Essential oils from the standard range are not food and are not taken internally. Lime is intended for the diffuser, the aroma lamp and, diluted, for the skin.

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.