Describing just how an essential oils benefits the body and mind is a bit like explaining why a hug always makes us feel better. Hugs offer layer upon layer of unique benefits—the physical touch of loved one’s skin, the smell of their hair or perfume, the warmth of their closeness. Oils work much the same way. They can be experienced topically, through respiration and as aromatherapy, all generating layers of vitality that the body can use and respond to.

That said, here’s a quick tutorial on how oils work their various wonders.

Essential oils are best defined as “highly penetrating concentrated extracts” that are derived from a diverse range of plant materials like leaves, seeds, rind, bark, flowers and blossoms. Each oil contains its own distinct mix of active molecules that can quickly penetrate the skin, lungs and olfactory organs. And like salt, a single molecule can go a long way. One tiny drop of essential oil can be the result of distilling pounds of plant material. Though they are small, the active molecules within each essential oil are incredibly potent.

Oils for the Ages

Essential oils have been used for therapeutic purposes for nearly 6,000 years. The ancient Chinese, Indians, Egyptians, Greeks, and Romans all used oils in cosmetics and perfumes, as well as for medicinal and spiritual purposes.

New Generation of Aromatherapy

Modern-day use of essential oils can be traced in large part to the findings of French chemist René-Maurice Gattefossé. He used lavender oil to treat a burn he experienced in a laboratory explosion and noted profound results. Inspired by his findings, he began to analyze the chemical properties of several essential oils and their benefits in treating burns, skin infections, gangrene and even wounds soldiers experienced during World War I. In 1928, Gattefossé officially founded the science of aromatherapy.

Aromatic Benefits & Respiratory Absorption

Our sense of smell influences a wide array of physical conditions in our bodies. The smell receptors in the nose communicate directly with the amygdala and hippocampus in the brain, where we store our emotions and memories. When the molecules in essential oils are breathed in, they stimulate those delicate sensory nerves and can therefore influence physical, emotional and mental health. (Some scientists believe that lavender stimulates the activity of brain cells in the amygdala in similar ways that sedative medications work.)

As in our example with the healing benefits of a hug, specific aromas can instantly trigger specific emotions. A whiff of grandmother’s hand lotion or homemade cookies can transport us back to early childhood. Experiencing the aromas associated with essential oils can create and reinforce important emotions. The connection between aromas and the limbic system – or emotional center of the brain – can strengthen relationships, improve memory and help with concentration.

The sense of smell also influences many physical functions, including stimulating the hormones and helping to regulate various metabolic processes. Likewise, as the microscopic molecules in essential oils enter the lungs, they can pass directly through to the bloodstream. 

Topical Applications

Just as the complex but tiny essential oil molecules can be transmitted easily through the olfactory system, they are also easily absorbed into the skin. Because our skin is somewhat permeable, the active chemicals in essential oils can be absorbed just like the ingredients in any common pharmaceutical treatment. Like cream-based hormone replacement therapies or nicotine patches, the beneficial ingredients in oils influence the body in the same way. When applied topically, they can have an immediate effect on a burn, scrape or bruise; they can also enter the bloodstream and travel quickly throughout the body as needed.

Some oils may be applied topically “neat” or without being diluted beforehand. Some are so potent, however, that they need to be mixed with a carrier oil for safety and for optimal results. Whenever you’re applying an essential oil topically, make sure to follow the usage instructions on the label.

Purity Matters

Years of research and development in the field of aromatherapy have proven that essential oils deliver better, more consistent results when the plants they are distilled from are grown according to exacting conditions. Likewise, the process of distillation and packaging can affect how well an essential oil will ultimately perform. Using only essential oils whose authenticity, integrity and origins are without question is the best way to ensure reliable and desirable results.