FAT - definition, sources , types and functions

1. FAT
Mrs.A.JEEVARATHINAM
Assistant Professor,
Department of Home Science,
V.V.Vanniaperumal College for Women,
Virudhunagar.

2. INTRODUCTION
• Fats, the richest source of dietary energy are organic compounds
made up of carbon, hydrogen and oxygen.
• Each gram of fats provides 9 calorie.
• Fat is known to have three elements which include carbon, hydrogen,
and oxygen. But, it has more amounts of carbon and hydrogen
compared to oxygen, hence leading to nine calories per gram.
• Fat is made up of different types of fatty acids, some of which are
necessary for health in small amount.

3. SOURCES

4. Types of Fats
Saturated Fat
• It is responsible for bad cholesterol. They are found in most animal
products like cheese, milk, meat and so on and hence one must limit
the quantity of intake. Consuming saturated fat in large quantities is
the most popular reason for heart diseases as it causes cholesterol to
block the arteries.
Monounsaturated fats
• Monounsaturated fats are healthy fats found in Avocados,
Macadamia nuts, Peanuts, Olives and Olive oil. It plays a vital role in
protecting the heart and also involved in supporting insulin sensitivity,
fat storage, weight loss, and healthy energy levels.

5. Types of Fats
Trans Fats
Trans fats are also called as unsaturated fatty acids or trans fatty acids. These
fats are obtained naturally in several foods such as beef, lamb, whole milk,
cheese, cream, and butter are acquired from cattle. Trans fatty acids that one
gets from vegetable oils also play a role in increasing the cholesterol levels.
Polyunsaturated Fats
• Polyunsaturated fats are healthy fats, which are abundantly found in both
plant and animal foods, such as vegetable oils, Walnuts, Flax seeds, salmon,
etc. These fats include both Omega 3 and Omega 6 fats. Omega 3 helps in
reducing inflammation, supports healthy hormone levels and cell
membranes. Omega 6 fatty acids play an important role in supporting
healthy brain and muscle functioning.

6. Functions of fats
• Provides energy.
• Keep the body warm.
• Protect internal organs.
• Helps body absorb vitamins A, D, E, and K through bloodstream.
• Produces hormones that help body to work properly.
• Serves as the storage substances for the body’s extra calories.