While there is little scientific proof for the effects of essential oil on health, the National Cancer Institute suggests that aromatherapy can be psychologically beneficial due to its effects on the brain. In other words, good smells lower stress and effect mood. Smells are processed by the limbic system, also known as the mammalian brain. The limbic brain also regulates mood and emotions, and smells also have a powerful ability to trigger memories, negative and positive. Some essential oils are more than just good smells, as they can temporarily improve mood and quality of life, according to the National Center for Alternative and Complementary Medicine.
Lavender
Lavender is a popular essential oil with a complex and pleasant smell. Traditionally, lavender oil is considered a relaxant. While scientific studies on lavender have not shown a direct correlation between lavendar and mood, you can create a positive association between the smell and relaxation, which is an important key to psychological health. Many massage therapists use lavender in their massage oil to accentuate the bodywork. Lavender oil also can be inhaled through a room diffuser, or by simply placing a few drops close to the person.
Lemon Oil
Citrus has a clean and stimulating smell. Like all essential oils, lemon stimulates the limbic system. According to a 2008 study in the journal "Psychoneuroendocrinology," smelling lemon reliably enhanced mood compared to just lemon or lavender. Essence of lemon or lemon balm are good choices for creating an atmosphere of peaceful alertness when studying for a test at home or working on a difficult project at the office.
Eucalyptus
Eucalyptus oil has a pungent smell, reminiscent of peppermint. Used often in mouthwashes and soaps, eucalyptus oil has an antibacterial function, according to the National Institutes of Health. As an essential oil, its somewhat harsh scent takes on a cleansing role, rather than comforting, similar to lemon. According to the National Association of Holistic Aromatherapy, Eucalyptus globulus is the most used Eucalyptus species in essential oils. Try placing a few drops of eucalyptus oil bath or in a basin of hot water and inhaling the steam.
References
- National Cancer Institute: Aromatherapy and Essential Oils
- National Center for Alternative and Complementary Medicine: Aromatherapy Makes Good Scents, But Does it Work?
- "Psychoneuroendocrinology": Olfactory Influences on Mood and Autonomic, Endocrine, and Immune Function
- National Institutes of Health: Eucalyptus Oil
- National Association of Holistic Aromatherapy: Eucalyptus
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