Basil Essential Oil is amongst the oils that I immediately think of when I want an oil that can help stimulate my mind and allow me to focus on the task at hand. Basil Oil is an energizing oil and is best used during the morning and daytime hours.
Basil Essential Oil tends to be one of the first oils that I select when I have a cold. It is considered anti-bacterial/anti-viral, it acts as an expectorant and it also helps keep me alert. Basil Oil is also said to help with headaches, though it's not one I commonly use for that purpose.
The chemical composition of Basil Essential Oil can vary greatly between varities, batches and suppliers. Ideally, look for Basil Essential Oil that has a a significant percentage of Linalool and that is weak in Methyl Chavicol (Estragole), a suspected carcinogen. Basil Oils that are higher in Linalool tend to have a more appealing aroma. Additionally, Linalool is said to act as an insect repellent.