Fat Content

there are some of them who gains fat like cashew and pista but others are very healthy.

Yes, fish is very good for you.

Your fat content will decrease with this change!

http://en.wikipedia.org/wiki/Saponification_value

Yes, quite a lot. One can know this simply by looking at the nutritional information on the back of a package.

Chocolate is composed mainly of sugar, and the cacao bean's two components- fat (cacao butter) and the cacao powder used to make cocoa.

Sometimes the cacao powder is removed entirely, with only the main ingredients of sugar and cacao butter. This is called White chocolate, and, by nature of it having cacao butter in it, it does have fat in it.

fats and oils are examples of components of food which are required by our body.

The food that you eat becomes digested by your body. After digestion what is required by the body is used and what is not required presently is stored for future use, mostly as fats. how you perceive the food/fat does not make any difference to the processes of digestion and storage that go on in your body. People gain weight because of lack of exercise, the type of food and the amount of food eaten, age and their genes. How individuals think about food influences how much they eat rather than how much fat they store. So, to answer the question, the statement is not true.

== == As a side note, the only way mentality affects your weight is stress. The more stressed you are, the more stress is put in your body, and the more stress is put on your body, the more it gets worn out. You can lose a lot of weight and get sick from too much stress.

Anorexics obsessively think of food as fattening and they are quite dangerously thin. Perception does not change physiology.

Proteins are neither saturated nor unsaturated.