Humulene is a key component of the hop plant. Other plants, such as clove and ginger, also contain it. One study in Frontiers in Pharmacology notes that terpenes, including humulene, may have potential in preventing allergic reactions and asthma. In animal models, humulene reduced allergic inflammation in the airways. This could make it a helpful compound for natural asthma treatments in the future.

Limonene appears to modulate the way certain immune cells behave, which may protect the body from a range of disorders. Limonene is also safe for people to take as a supplement.

Pinene is another naturally abundant terpene. There are two forms of pinene: a-pinene and b-pinene. Shirin-yoku, which means “forest bathing,” is a Japanese therapy that involves taking leisurely walks in the forest, and may have preventative and restorative effects on a person’s psyche and physiology according to this study: Acta Salus Vitae

Beta-caryophyllene exists in many herbs and vegetables, such as cloves and black pepper. Similarly to other terpenes, beta-caryophyllene may support a healthy inflammation response.

Linalool is one of the more important compounds in aromatherapy and is responsible for the calming effect many people get when smelling lavender or its essential oil. Linalool does appear to act on the body, but researchers must study its effects further to understand how people can use it to benefit their health.

Myrcene is a terpene commonly found in plants such as hops, lemongrass, and thyme. The flowers of the cannabis plant also contain myrcene. Myrcene is a powerful antioxidant. One study on mice concludes that myrcene could help protect the brain from oxidative damage following a stroke.