วันพุธที่ 10 สิงหาคม พ.ศ. 2554

Olive Oil for a Healthy Heart

Olive Oil for a Healthy Heart
A healthy heart means a healthy mind and a healthy body. Today, healthy lifestyle and proper food habits have taken a toll and this is affecting the human heart in a very bad way. Rising cholesterol levels is a serious concern. Olive oil is said to have a healthy impact on the heart. Let's see how.

A hectic lifestyle, improper rest and inappropriate diet, contribute in affecting the human body in a negative way. The human body functions at its best when blood is pumped to each and every part of the body without any hindrance. A healthy heart is a result of proper diet. Diet containing high level of fat can be harmful to the heart. But, not all fat content is bad for the human heart. Fats can be categorized as harmful dietary fat comprising of saturated fat and trans fat and healthier dietary fat comprising of monounsaturated fat and polyunsaturated fat. It is important to incorporate healthy fat content in the diet and avoid unhealthy fat. 

One source of healthy dietary fat is Olive oil. It is used in Mediterranean diet as a key constituent and is obtained from olive, which is a crop of the Mediterranean basin. American diet consists of unhealthy fat in a large proportion in the form of butter, cheese, mayonnaise, etc. This is why, the incidence of cardiovascular diseases is more in America as compared to a Mediterranean countries. But these days, awareness about incorporating healthy fat in the food has triggered the use of olive oil in the diet. There are numerous
 benefits and side effects of olive oil. It can be used for cooking and seasoning. There are various types of olive oil available in the market. The extra virgin olive oil is the best one and is recommended for people aiming at reducing high cholesterol levels.

Chemical Composition of Olive Oil
To understand how olive oil and cholesterol levels are related, lets have a a quick look at the chemical constituents of olive oil. The oil contains:
  • Fatty acids
  • Peroxides
  • Free fatty acids
  • Polycyclic aromatic hydrocarbons
  • Polyphenols
  • Vitamins
  • Pigments
Olive oil comprises mainly of triacylglycerol molecules. Different types of fatty acids are attached to a triacylglycerol molecule. They include oleic acid, linoleic acid, palmitic acid, stearic acid and linolenic acid. Oleic acid is the major fatty acid making up around 55-83% of olive oil. It is a monounsaturated fatty acid i.e., a healthy dietary fat. Including olive oil in the diet increases the proportion of healthy dietary fat in the body.

Does Olive Oil Reduce Cholesterol?
The chemical composition of olive oil makes it clearly evident that olive oil has more of healthy dietary fat as compared to harmful fat. Human heart is supplied with blood through coronary arteries. Rise in bad cholesterol level in the body will result in deposition of fats in coronary arteries as well. This will cause blockage in the arteries and the heart will have to pump harder in order to push the blood through the blockage to various body parts. This exerts pressure on the heart muscles and results in hypertension or rise in blood pressure. Rising cholesterol levels may also lead to serious heart diseases.
 

Use of olive oil helps in reducing cholesterol level in the body to some extent. The monounsaturated fatty acids in olive oil help in reducing the total cholesterol level and low density lipoprotein level in the body. Also, monounsaturated fatty acids do not lower the level of high density lipoprotein which is beneficial to the body contrary to polyunsaturated fatty acids which may reduce HDL cholesterol. In this way, olive oil increases the content of healthy fat in the body and reduces unwanted fat. It must be kept in mind that using olive oil along with food containing saturated fat will not reduce the bad fat content. One should replace unhealthy fat with olive oil to gain its benefits.
 

The Food and Drug Administration allows the manufacturers of olive oil to mention in the label that, "some evidence suggest that use of two tablespoons of olive oil daily may reduce the risk of coronary heart disease due to the presence of monounsaturated fats in the oil".

For those who are busy shedding kilos of weight, don't forget that olive oil has same amount of calories as found in other oils. So, watch out for the portion of oil you consume. If you are someone who is at a high risk of developing coronary artery disease due to high cholesterol level in the body, it isn't be a bad idea to replace all the unhealthy fat in your diet with healthy fat in the form of olive oil, reduce the cholesterol level and have a healthy heart!


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