Safety Precautions

Very Toxic Oils

Aniseed, Mugwort, Pennyroyal, Wintergreen

Be extremely cautious when you must use these oils, using only small amounts and storing them safely away from children.

Semi-Toxic Oils

Cassia, Birch, Cedarwood, Cinnamon Clove, Fennel, Lemon, Thyme

All of these, plus Orange and Eucalyptus can also become increasingly toxic if used repeatedly over a period of time.

Pregnancy – Avoid

Basil, Clary Sage, Hyssop, Juniper- Berry, Marjoram, Pennyroyal, Rosemary and large amounts of Peppermint

Any of them can prematurely induce labor. Also avoid the very toxic and semi-toxic oils, to protect the fetus.

Epilepsy – Avoid

Fennel, Sage and large amounts of Rosemary or Hyssop

These could provoke an unwanted epileptic reaction IF a person has a predisposition to this condition.

Be Aware of the Skin Irritants

All Citrus oils (except Bergamot), Black Pepper, Cinnamon Bark, Citronella, Clove, Ginger, Lemongrass, Melissa, Nutmeg and large amounts of Cinnamon Leaf or Peppermint


Exposure to direct Sunlight should be avoided after application of Bergamot. Otherwise, skin discoloration may result due to increased photosensitivity.

Persons with Asthma should use smaller amounts of any of the essential oils. The amounts can then be increased gradually if there is no sign of an adverse reaction.