Which oil is known to have a stimulating effect on the nervous system?

Lavender is widely recognized for its calming and relaxing effects, making it a popular choice in aromatherapy for stress relief and sleep improvement. However, it is not typically associated with stimulating the nervous system. On the other hand, the oil known for its stimulating properties is often cardamom. Cardamom is celebrated for its uplifting qualities, as it can invigorate the senses and enhance alertness, supporting mental clarity and focus. Its warm, spicy aroma can help to energize individuals and combat fatigue, therefore making it a suitable option for stimulation of the nervous system.

The other options, fennel and cinnamon, while they possess their unique therapeutic benefits, do not primarily serve as stimulants for the nervous system. Fennel is more associated with digestive support, and cinnamon is valued for its antioxidant properties and ability to improve circulation, but not specifically for stimulating the nervous system.