Oils That Should Not Be Used At All In Aromatherapy:

• Almond, Bitter
  
• Aniseed
  
• Arnica
  
• Boldo Leaf
  
• Calamus
  
• Camphor
  
• Cassia
  
• Cinnamon Bark
  
• Costus
  
• Elecampane
  
• Fennel (Bitter)
  
• Horseradish
  
• Jaborandi Leaf
  
• Mugwort (Armoise)
  
• Mustard
  
• Origanum
  
• Origanum (Spanish)
  
• Pennyroyal (European)
  
• Pennyroyal (N. American)
  
• Pine (Dwarf)
  
• Rue
  
• Sage
  
• Sassafras
  
• Sassafras (Brazilian)
  
• Savin
  
• Savory (Summer)
  
• Savory (Winter)
  
• Southernwood
  
• Tansy
  
• Thuja (Cedarleaf)
  
• Thuja Plicata
  
• Wintergreen
  
• Wormseed
  
• Wormwood