Disclaimer & Safety
The additional information provided by oliemeesters  on our e-commerce site (groothandelolie.nl) and via other Social Media Channels is only for personal information and interest. It is not intended to provide professional medical advice or treatment for any condition. You should not use our site or the advice on our site for the treatment of health problems or for self-diagnosis. We recommend that you consult your doctor or nurse if you are concerned about your health.

Please note that Oil Masters assumes no liability for misuse of essential oils or other products it manufactures, packages or supplies, or for any reliance on any information provided by us through our e-commerce site or other Social Media channels.

Additional Safety Advice

Essential oils are highly concentrated, powerful liquids. Their potency must be respected and they can be toxic if used incorrectly. The way you handle and use essential oils is very important. Read the following advice to ensure that you use essential oils safely and effectively. Please note that this list is not a complete safety reference. If you are not sure, read carefully before processing the oils.

Certain essential oils are flammable liquids.

Always keep out of the reach of children.

If you have a medical condition and are taking medication or receiving medical treatment, you should discuss with your doctor and a qualified aromatherapist whether it is safe to use aromatherapy in conjunction with the prescribed treatment.

Certain essential oils should be avoided during pregnancy 

Always consult a qualified aromatherapist before using essential oils on babies and children.

Never take essential oils orally directly and avoid any contact with the mouth area and eyes.

Essential oils should never be applied undiluted to the skin as they can cause irritation (there are only a few exceptions to this rule, namely Lavender and Tea Tree). 

Certain essential oils (eg herbs) can cause skin irritation in people with sensitive skin. If you have sensitive skin, we recommend that you do a small patch test before using a new oil or product.

Some essential oils such as Bergamot and other citrus oils are phototoxic, meaning they can cause skin sensitization and discoloration in bright sunlight. These oils should not be applied to the skin before direct exposure to sunlight.


Many essential oils are flammable, so never use or place your essential oil bottles near an open flame, fire, or other ignition source.

Undiluted essential oils

Never use essential oils on children under 3. Their underdeveloped and fragile organs cannot properly excrete the oils or process their metabolites efficiently.


If you are pregnant, you should seek advice from a doctor, midwife or aromatherapist before using essential oils.

Much of this misinformation is based on the internal use of the plant in herbal preparations, and this is certainly not the same as using a diluted essential oil externally in massage. Most essential oil experts state that many of the contraindicated essential oils are used as food additives and therefore can hardly be considered dangerous.

If you have a history of miscarriage, do not use essential oils at any point during your pregnancy.

Essential oils to avoid during your pregnancy include:

Camphor (Cinnamomum camphora)

Rosemary (Rosemarinus officinalis)

Sage (Salvia officinalis)

Savin oil (Juniperus sabina) - Never use in aromatherapy

Babies, toddlers and young children

As already mentioned, never use undiluted essential oils on babies up to 3 years old. 

Internal use

Never take essential oils internally.

You may read articles in magazines and books extolling the virtues of taking essential oils internally, but you should absolutely never attempt this without expert guidance.

Irritants and Sensitizing Substances

Some essential oils can irritate the skin if used in too high a concentration or for a long period of time. The essential oils below are the most well-known from this group.

Bay leaf oil (Pimenta racemosa)

Cinnamon Bark Oil (Cinnamomum zeylanicum)

Clove Oil (stem, leaf, bud) Syzygium aromaticum

Litsea Cubeba aka May Chang oil (Litsea cubeba)

Origanum oil (Origanum vulgaris)

Tagetes oil (Tagetes minuta)

Thyme white and red oil (Thymus vulgaris)


Photosensitivity, also known as photoirritation or phototoxicity, is a chemically induced skin irritation that can occur when you apply certain essential oils topically and expose your skin to UV light too quickly.

Some examples of the irritation you may experience are:





Skin discoloration


Certain essential oils contain furocoumarins (wikipedia). Furomarines are naturally occurring organic chemical compounds produced by specific plants. These chemical compounds are a defense mechanism that the plant uses to repel small animals or insects in nature. Some of the most common furocoumarins are oxypeucedanine and bergapten, which are found in many citrus fruits and cold-pressed essential oils. Some essential oils are slightly photosensitizing and should be avoided before sunbathing or using a tanning bed. The main photosensitizing oils used in aromatherapy are

Angelica oil (Angelica archangelica)

Bergamot oil expressed (Citrus aurantium ssp. bergamia)

Bitter Orange Oil (Citrus aurantium)

Cumin oil (Cuminum cyminum)

Lemon oil, cold pressed (Citrus limonum)

Lime oil pressed (Citrus aurantifolia)

Grapefruit oil (Citrus paradisi)

Tagetes oil (Tagetes minuta)

If you like Bergamot essential oil and want to get out in the sun, use Bergamot FCF, which has had its photosensitizing ingredients removed.

To reduce the effects of photosensitivity, users should avoid the sun, tanning beds or UV light for 12-18 hours after applying the oil to exposed skin.

Oils to be avoided altogether

Some essential oils should not be used in aromatherapy at all because of the danger of toxicity, severe irritation, hypersensitivity or other serious health risks. Most responsible aromatherapy suppliers do not offer such oils, but the oils below still find their way onto the market and should only be used by people who have undergone the necessary specialized training.

Parsley herb oil (Petroselenium crispum)

Pennyroyal oil (Mentha pulegium)

Savory oil (Juniperus sabina)

Tansy oil (Tanacetum vulgare)

Wintergreen oil (Gaultheria procumbens)

Wormwood oil (Artemisia absinthium)