Essential oils are highly concentrated plant extracts. Safe use depends on dilution, duration, frequency, individual sensitivity, and the specific oil being used.

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This guide follows dilution ranges commonly referenced by the Tisserand Institute and widely taught in professional aromatherapy training. It is intended for general topical (skin) use guidance, not medical treatment.

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Essential oils are powerful. Using them undiluted or at excessive strength increases the risk of:

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• skin irritation

• sensitisation over time

• adverse reactions in babies and children

 

Dilution reduces risk while still allowing the oil’s aroma and supportive properties to be experienced.

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Recommended topical dilution ranges (by age)

These ranges are general guidelines, not fixed rules. Some oils require lower limits, and some should be avoided entirely for certain individuals.

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Babies & children

• 0–3 months: 0.1–0.2%

• 3–24 months: 0.25–0.5%

• 2–6 years: 1–2%

• 6–15 years: 1.5–3%

 

Adults

• 15+ years: 2.5–5%

 

When in doubt, use the lowest dilution, use it less often, and observe the response.

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What “dilution” actually means

Dilution refers to mixing essential oil into a carrier oil such as:

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• sweet almond

• jojoba

• grapeseed

• fractionated coconut oil

 

Lower dilutions = fewer drops of essential oil per amount of carrier oil.

For babies and young children, very small amounts are appropriate. Stronger does not mean better.

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Patch testing (recommended)

Before wider use, especially with a new oil:

1. Apply a small amount of the diluted oil to the inner forearm

2. Cover and leave for 24 hours

3. Do not use if redness, itching, or irritation occurs

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Duration & frequency

How often and how long an oil is used matters just as much as strength.

Good practice includes:

short periods of use

breaks between applications

avoiding “all day, every day” routines — especially for children

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Oils with special considerations

Some essential oils have additional safety notes due to:

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• skin sensitisation potential

• phototoxicity (sun sensitivity)

• stimulation effects

 

These oils often require:

• lower maximum dilutions

• shorter duration of use

• or complete avoidance for certain age groups

 

Always check individual oil guidance rather than assuming all oils behave the same way.

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Pregnancy & breastfeeding

If you are pregnant, trying to conceive, or breastfeeding:

• use lower dilutions

• avoid prolonged or frequent use

• seek guidance from a qualified professional if unsure

 

Peppermint & breastfeeding

Professional safety discussions note that peppermint oil may reduce milk supply for some breastfeeding mothers.

A cautious approach is to avoid peppermint or use it sparingly if supply is a concern.

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When to seek professional advice

Extra care is advised if:

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• the user is pregnant or breastfeeding

• the oil is being used on babies or young children

• there is a history of asthma, epilepsy, or skin conditions

• regular medication is being taken

• the oil is being used repeatedly or long-term

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Final note

Essential oils are best used as supportive, aromatic companions, not as replacements for medical care. Responsible use prioritises safety, moderation, and informed choice.

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Important

This information is provided for educational purposes only and is not intended to diagnose, treat, or cure any condition. If you have health concerns or are unsure about safe use, consult a qualified healthcare professional or trained aromatherapist.

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