A study was conducted in October 2010 published in the National Center of Biotechnology Information, National Library of Medicine titled “Effects of Aromatherapy on Changes in the Autonomic Nervous System, Aortic Pulse Wave Velocity and Aortic Augmentation Index in Patients with Essential Hypertension.”
The study created two groups to undergo a clinical trial using aromatherapy to address blood pressure. The first group of 22 participants assigned to the experimental group. The second group of 20 participants to a more controlled environment. According to the study, “The experimental group was given a blend of oils of lemon (Citrus Limonum), lavender (Lavandula angustifolia), and ylang-ylang (Cananga odorata) prepared in the ratio of 2:2:1, respectively. The control group received lemon fragrance of Limonene (35 cc) and Citral (15 cc) mixture. The experiment, inhalation, was conducted for three weeks (2 min per inhalation, two times per day) to both groups.”
According to the study, the result is a significant improvement in the systolic blood, sympathetic nerve system activity of heart rate between the groups.
Ylang Ylang – Found in the Philippines, Malaysia, Indonesia, and some other islands of Indian Ocean, mainly the Comoro, Nossi Be, and Madagascar islands. Ylang-ylang oil is used to treat depression, high blood pressure, and anxiety. Ylang Ylang is rich in chemical compounds such as monoterpene, sesquiterpenes, and phenylpropanoids that are “antimicrobial, antibiofilm, anti-inflammatory, antivector, insect-repellent, antidiabetic, antifertility and antimelanogenesis.” (Source: National Center of Biotechnology Information)
Lemon -Lemon essential oils include twenty one components of which two dominant compounds were identified limonene (39.74%) and β-Pinene (25.44%). These two compounds are efficient as antioxidants.
Lavender : The composition of the essential oil includes seventy-eight compounds have been identified . The major constituents of the oil were linalool (30.6 %), linalyl acetate (14.2 %), geraniol (5.3 %), β-caryophyllene (4.7 %), lavandulyl acetate (4.4 %). (Source: )