The Basil Allergy Test is a blood test used to determine if you are allergic to Basil. Hypersensitivy to Basil is assessed using a qualitative allergen specific IgE test. If you are concerned that you may be allergic to Basil it is important to get tested. Such hypersensitivities tend to get worse over time and can result in anywhere from mild often unnoticed symptoms to life threatening reactions.