Test for Fats

What Are Fats?

Fats are a fundamental part of our diet and are important for good health. They are the major source of energy and aids our body in absorbing fat-soluble vitamins. There are different types of fats, with some fats being healthier and others dangerous. On average, a healthy person requires about 10 to 15 percent of overall calories as fat. To maintain a healthy life, it is important to eat unsaturated fats in small amounts. If fats are taken in large amounts, including both saturated and unsaturated fats, it can lead to a weight gain in an individual which could be followed by several health disorders. Lipids are different from fats. Fats are the oily substance found around the organs or below the skin, whereas lipids are the organic molecules, which are soluble in organic solvents and insoluble in water.

Why Do We Perform Test For Fats?

There are different methods used for testing the presence of fats in the given food samples. Here let us perform a simple and easy experiment with the help of a filter paper called the Paper Spot Test.

Test for Fats

Materials Required

  • Filter paper
  • Sunlight or any other source of light
  • Food sample – Oil, Butter, Cheese, deep fried potato chips etc.


  • Select the food sample for which you need to test for fats.
  • In a filter paper, take a small quantity of the food.
  • If the food sample is liquid like butter, oil, and cheese, gently spread it and if you are using potato chips, then crush it and wrap the paper slowly. Make sure paper is not damaged.
  • Leave the experiment undisturbed for 3 to 5 min aside.
  • Now straighten the paper and allow it to complete either by keeping it in sunlight or near the open window.
  • Now observe for the changes on the paper.

We can observe an oily patch on the paper, which indicates the presence of fats in the given food sample.

The result is positive. According to the observation, the presence of fats in the given food sample is indicated by the oily patch on the paper. The filter paper observes the oil from the food sample and becomes translucent. This was a simple experiment which is used to check for the presence of fats in the given food sample. This Paper Spot Test for fats can be performed for different sources of food and can maintain a healthy life.

Types Of Fats

Fats are of different types. Four to be precise.
1. Saturated Fat
They contribute to the bad cholesterol and are usually present in animal products such as milk, cheese, meat etc hence should be consumed in limited quantity. Saturated fats are substituted by unsaturated fats to lower cholesterol levels. Trans fatty acids play a similar role. Consumption of saturated fat in abundance is the most common reason for heart diseases.

2. Polyunsaturated Fats
They are found in animals and plant-based foods and are healthy fats. Examples – Omega-3 fatty acids, Omega-6 fats. They aid in muscle functioning and supporting the functioning of a healthy brain.

3. Monounsaturated Fats
They are healthy fats usually found in peanuts, olives and its oil, Avocados etc and enables smooth functioning of the heart and aids insulin sensitivity, storage of fat, weight loss and helps in maintaining high energy levels.

4. Trans Fats
They are also referred to as trans fatty acids or unsaturated fatty acids and are naturally found in food derivates obtained from cattle such as milk, cream, cheese, lamb, beef etc. One beneficial and natural trans fatty acid is the conjugated linoleic acid that aids in strengthening the immune system and checks the growth of cancer cells. Conversion of liquid oils into solid fats yields trans fats. They are found in processed food products such as snack foods, cookies, deep-fried foods etc.

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