Toxic Essential Oils
Bitter almond — toxic (contains cyanide).
Boldo leaves — can cause convulsions and it’s extremely toxic.
Buchu — diuretic, could potentially cause liver damage. • Calamus — can cause convulsions and hallucinations.
Camphor — can cause convulsions, toxic.
Fennel (bitter) — it is toxic, can cause a spontaneous abortion.
Horseradish — it is toxic.
Jaborandi leaf — it is toxic.
Mugwort — quite dangerous, it is considered a neurotoxin.
Mustard — it is toxic, it can cause inflammation.
Nightshade — it is toxic.
Pennyroyal — it is extremely toxic, can damage the liver and lungs (even in small doses).
Rue — it is toxic, can burn and irritate the skin.
Sassafras — it is toxic, can be lethal.
Savin — it is toxic.
Savory — can cause a toxic reaction.
Southernwood — it is toxic.
Tansy — it is toxic, can be lethal.
Turmeric — it is toxic.
Wintergreen — it is toxic, can be lethal.
Wormseed — it is toxic.
Wormwood — it is toxic.
Essential Oils that Irritate the Skin
Aniseed — it slows down circulation and the high anethole content can cause dermatitis.
Basil — could possibly cause irritations.
Bay — can cause skin irritation.
Birch — can cause irritations during pregnancy.
Black pepper — it can cause sensitive skin.
Cassia — it’s a dermal irritant, can cause sensitive skin.
Clove — can cause skin irritation.
Cumin — can cause skin irritation.
Elecampane — can cause sensitive skin.
Lemongrass — can cause skin irritation.
Lemon verbena — can cause skin irritation.
Melissa (lemon balm essential oil) — can irritate very sensitive skin.
Oregano — can cause irritation.
Pine — can cause irritation or allergic skin reactions.
Tagetes (French marigold) — can cause skin irritation, has emmenagogue properties (stimulates blood flow in the pelvic area and the uterus).
Emmenagogue Essential Oils
Cedarwood — has emmenagogue properties.
Cinnamon — has emmenagogue properties and it can irritate skin.
Clary sage — has emmenagogue properties and can induce headaches.
Damask rose — has emmenagogue properties, tones the uterus, has a laxative effect.
Fennel (sweet) — can have a narcotic effect and contains high levels of trans-anethole, has emmenagogue properties.
Hyssop — has emmenagogue properties and can be toxic.
Jasmine — has emmenagogue properties.
Juniper, juniper berry — it can stimulate the uterine muscle, has emmenagogue properties.
Marjoram (sweet) — has emmenagogue properties.
Myrrh — it can stimulate the uterine muscle, has emmenagogue properties.
Nutmeg — it can stimulate contractions, has emmenagogue properties.
Parsley seed — has emmenagogue properties.
Peppermint — has emmenagogue properties, can stop milk flow.
Rosemary — has emmenagogue properties.
Sage — has emmenagogue properties, it is somewhat toxic.
Tea tree — can cause skin irritation, contact dermatitis.
Thuja — it can stimulate uterine contractions and cause a spontaneous abortion.
Thyme — it can stimulate secretory systems.
Rosemary extract and thymus schimperi (a type of thyme) should be avoided by women who are Trying-to-Conceive.