Sesame oil is one of those vegetable oils that are considered as good for the health. Most of the nutritionists support it for two reasons.
First, it's rich in mono and polyunsaturated acids (PUFAs) - the good fat that cuts back cholesterol.
Second, it is low in saturated fats – the bad fat that add cholesterol.
Sesame oil also contains two special chemicals called sesamol and sesamin. They are very powerful antioxidants.
Now there's evidence that sesame oil can lower blood pressure. It comes in a report to the American Heart Association's annual meeting of the Inter-American Society of Hypertension by Devarajan Sankar, DO, PhD, of Annamalai University, Chidambaram, Tamil Nadu, India.
Sankar and his colleagues studied 195 men and 133 women with high blood pressure. All were taking nifedipine (brand names include Adalta, Nifedical, and Procardia), a common blood pressure-lowering medicine. Despite this treatment, they still had moderate high blood pressure. Then the patients are requested to switch to sesame oil as the only cooking oil.
In Sixty days, their average blood pressure back into the normal range. Additionally it can also helps to lower ldl cholesterol and to rise hdl cholesterol in high cholesterol patients.
For further information in this subject
http://www.umm.edu/altmed/articles/omega-3-000316.htm