Ingestion is rarely used in the UK. Of the two remaining pathways, inhalation is the most effective method and indeed is regarded by some as the only method truly deserving the name Aromatherapy.

Ingestion is the main route employed by the aromatologists and doctors in France, but is not widely used by aromatherapists in other countries. These oils can be used internally through the mouth or the anus in the form of suppositories or pressaries 
While taking oils by mouth, the knowledge of  its contents is most important.

Access via the nasal passages is indisputably the quickest and the most effective route in the treatment of emotional problems such as stress and depression. This is becasuse the nose has direct contact with the brain, which is responsible for triggering the effects of essential oils. 

• Steamers
• Baths
• Spray bottle
• Vaporizers and diffusers

Until the second half of the 20th century, the skin was thought to be almost impermeable. This old idea still persists. But the fact is that skin is one of the most effective medium for the access of aromatic oils in the body. The large area of the skin makes it possible for a significant quantity of essential oils to be applied to the skin and so taken into the body.