Cold-pressed from the peel of Citrus paradisi. Sparkling, sweet and faintly bitter — the brightest and most immediately cheerful of the citrus oils, and the one that most smells like being handed the fruit.
Phototoxicity — the practical rules
Like other cold-pressed citrus peel oils, grapefruit contains furocoumarins that react with ultraviolet light and can cause burning or lasting brown pigmentation where the oil sat.
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Keep it at or below 4 per cent on skin that will see daylight — about 24 drops in 30 ml of carrier oil. Grapefruit is more forgiving than lemon and far more forgiving than bergamot, but it is not exempt.
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Avoid sun and sunbeds for at least 12 hours after applying it to skin.
- Diffusion and household use are not phototoxic. The risk is oil on skin plus UV.
About the grapefruit drug interaction — an honest clarification
Grapefruit is famous for interfering with a long list of medicines, and people reasonably ask whether that applies here. The interaction concerns eating grapefruit or drinking the juice, where furanocoumarins reach the gut in quantity and inhibit an enzyme (CYP3A4) that breaks down many drugs. Smelling the essential oil in a diffuser is not a comparable exposure.
What follows from that is simple and worth stating: this is another reason never to swallow essential oils. If you take medication and have been told to avoid grapefruit, avoid it as a food and do not put this oil in your mouth or in a drink. Diffusing it is a different matter.
What an essential oil may and may not claim
Grapefruit is commonly sold on the promise that it "lifts the mood in an instant", that it is good for "mental fatigue or moodiness", and that it can "tone and purify congested, oily or blemish-prone skin". None of that appears here. Claims about mood and about treating skin conditions are health claims, and none is authorised in the EU for any essential oil.
The true version needs no defence: it smells wonderful and it makes a kitchen smell like a good morning.
How to use it
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Diffusion: a few drops, ventilated room, twenty to thirty minutes. Superb with rosemary, peppermint, ginger, bergamot, vetiver and black pepper.
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Household: excellent in a vinegar-and-water surface spray. Like all citrus oils it is a genuine solvent, so keep it off unsealed wood, painted surfaces and plastics.
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Patch test at your intended dilution and wait 24 hours.
- Not around babies, young children, pregnant women or pets — cats especially.
Storage — the most important care point
Grapefruit is one of the shortest-lived essential oils. It is dominated by limonene, which oxidises quickly, and oxidised citrus oil is a skin sensitiser where fresh oil is not. Keep the cap tight, store it in the fridge, and replace it about a year after opening — sooner if it starts to smell flat, waxy or turpentine-like.
Safety — the essentials
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Never swallow essential oils without the direct supervision of a qualified health professional.
- Keep out of reach of children, in the original bottle with the child-resistant cap.
- In eyes: flush with plain vegetable oil rather than water.
- Accident or swallowing: in Portugal call CIAV on 800 250 250 — free, 24 hours. In an emergency, 112.
Propos'Nature
Propos'Nature
Propos'Nature
