Molecular Structure Of Lipids | 5 Important Points

Molecular Structure Of Lipids | 5 Important Points

Molecular Structure of Lipids


Introduction: Lipids are universal components of all living cells and perform many functions. In this article, we will review the structure of lipids, lipid metabolism, the biological functions of lipids, and the role of lipids in various disease conditions.


1. The Structure of Fatty Acids


Fatty acids are organic molecules used by the human body for various functions. They are present in almost all foods and are essential for life.

They are classified into saturated and unsaturated fatty acids. Saturated fatty acids are stable at room temperature, while unsaturated fatty acids are liquid.

Saturated and unsaturated fatty acids differ in the number of carbon atoms and double bonds. Saturated fatty acids contain at least one and up to six carbon atoms. They are known as saturated fatty acids.

Unsaturated fatty acids contain more than six carbon atoms. These fatty acids are also called polyunsaturated fatty acids.

Most fatty acids are essential for the body and are required in small quantities, while some harm our health.

We need these fatty acids to maintain good health. The essential fatty acids for the human body are:

Monounsaturated fatty acids

These are fats rich in omega-9, omega-7, and omega-6 fatty acids. They have a low melting point and are liquid at room temperature. These fatty acids are considered suitable for the body because they are easily digested and absorbed by the body.

Polyunsaturated fatty acids

They are in small quantities in foods and stored in the body. They are also called essential fatty acids. These are also referred to as essential oils because they are necessary for the body.

Omega-3 fatty acids

These are called beneficial fatty acids and are present in fish oils. They are also essential for the body.

Omega-6 fatty acids

These are also called essential fatty acids and are present in vegetable oils and the body.

Beneficial omega-3 fatty acids

These are found in oily fish such as salmon and mackerel but can also be taken as supplements.

Beneficial omega-6 fatty acids

These are present in vegetable oils and are also found in some grains.


Now that you know what a fatty acid is and which are the essential fatty acids for the human body let’s discuss the structure of fatty acids.

Structures of fatty acids

You will find the following structures of fatty acids in different food sources:

Fatty acids are made up of carbon, hydrogen, and oxygen. There are three different forms of fatty acids.

Carbon chain

The carbon chain is the backbone of a fatty acid. It is formed by combining carbons to make a linear chain. The carbon chain consists of a series of carbon atoms connected by single bonds.

Hydrogen and oxygen

These are the most common components of fatty acids. They are responsible for the fatty acid being fat.


By reading this post, you will learn what a fatty acid is, the essential fatty acids, and their structure. I hope you will hold these tips in mind for a healthy body.


2. The Structure of Glycerol


Glycerol is one of the simplest alcohols that can be produced through fermentation. It is a colorless transparent liquid widely used as a solvent in chemical and pharmaceutical industries. Its primary application is as a moisturizer and humectant in cosmetics, food, and beverages.

How is Glycerol produced?

The fermentation of glucose produces it in the presence of yeast. The fermentation process involves converting carbohydrates into alcohol and carbon dioxide. There are three stages of fermentation – the beginning, the growth phase, and the end.

The beginning stage of fermentation is when glucose gets converted into Glycerol. The yeast will absorb a certain amount of carbon dioxide and alcohol vapors during this stage. In this case, Glycerol is formed as a by-product of the fermentation process.

The growth phase is the most extended period of the whole process. During this phase, the yeast will continue to consume the sugars and convert them into alcohol and carbon dioxide. During this phase, the amount of glycerol production will increase gradually.

The end stage of fermentation is the final stage of the process. When the sugar is converted into alcohol, the yeast will die and stop producing drinks. This is when the Glycerol is produced as a by-product.

What is the composition of Glycerol?

It consists of about 55% water, 44% glycerol, and 1% to 2% impurities. It is a clear liquid that is colorless and has the characteristic odor of soap. It is a very stable compound and can be stored for a long time. It has a strong sweet smell and is suitable as a flavoring agent in foods and beverages. It has a very tall melting threshold of 60 degrees Celsius.

Is Glycerol safe to consume?

Yes, it is safe to consume. It is the same alcohol as the one in your body and is a normal constituent of the human body. Glycerol is also present in the body tissues and helps form bones and cartilage. It is an essential component of the body and can be easily absorbed by the body.

Is it safe to use for cosmetics?

Glycerol is an excellent humectant. It is a natural moisturizer that can be easily used in cosmetics. It can be used for the treatment of dry and cracked skin.


So, this was complete information about the structure of Glycerol. I hope you found it helpful, and I am sure you will be impressed by the results.

Molecular Structure Of Lipids | 5 Important Points

3. The Structure of Phospholipids


We all know that phospholipids are the main components of cell membranes. These compounds are the essential components of our body. They are responsible for maintaining the structural integrity of our cell membrane.

There are two kinds of phospholipids present in our body; they are called phosphatidylcholine and phosphatidylethanolamine. They are the two main phospholipids that are present in our bodies. Both of these compounds have a similar structure, but they differ in terms of their composition.

Phospholipids are present in every organ and tissue of the human body. They are mainly found in the cell membranes, and the structure of these compounds is quite interesting.

Let’s talk about the two phospholipids that are present in our bodies.


Phosphatidylcholine is a compound that is mainly found in the brain. It is one of the essential constituents of brain cells and helps maintain the integrity of the cell membrane.

It has two molecules of fatty acids attached to a head group.


Phosphatidylethanolamine is another type of phospholipid that is mainly present in the brain and retina of our eyes. It is also present in our nerve cells.

This compound is similar to phosphatidylcholine but has a different composition.

Both phospholipids are essential for the cell membrane’s structural integrity and play an indispensable role in regulating membrane function.


So, these are the two main phospholipids in our body. They are mainly used for the maintenance of the structural integrity of our cell membrane.


4. The Structure of Triacylglycerols


There are several types of fats, and triacylglycerols (TAG) are one of the essential fats that you need in your diet. Tags are fats made up of three fatty acids and are considered one of the building blocks of your body.

What are triacylglycerols?

These combinations are used in the food industry to add a creamy texture to foods. These are used as an emulsifier for margarine and an ingredient in ice cream and dairy products.

How are triacylglycerols formed?

They are formed when fats are broken down into smaller molecules, and each molecule contains a fatty acid chain. These fatty acids then combine to form TAG molecules. The process of formation of TAGs is called de novo lipogenesis.

What are the uses of triacylglycerols?

The primary use of TAGs is as a carrier of fat and nutrients. In the human body, TAGs are used to carry energy as well as hormones.

What are the health benefits of triacylglycerols?

The main benefits of eating TAGs include:

Reduced cholesterol levels

It has been proven that eating TAGs helps reduce cholesterol and protects you from diseases like heart attacks.

Healthier hair and skin

A study says that eating TAGs helps improve the condition of the skin and hair.

Fatty acid composition

Another study says that TAGs contain omega-6 fatty acids and omega-3 fatty acids, which are essential for the body.


If you are looking for the details of TAGs, this article is for you. Tags are essential for your body because they are a necessary component of the human body.

Lipids Infographic | 5 Important Points

5. The Structure of Sterols


The structure of steroids is not the same as the structure of cholesterol. Sterols are made from cholesterol. Sterols are used to produce vitamin D and are essential for the proper functioning of our body. It is also employed in the manufacture of steroid hormones.

The human body does not use sterols because they are not good enough to be consumed. They are very unstable and can be decomposed in the body in the presence of sunlight.

Sterol is a fat-soluble vitamin, and it is present in the form of esters in our body. It is present in animal and vegetable fats, eggs, dairy products, cereals, and meats.

Sterol is also a component of soap and shampoo.

Structure of steroids

Sterols are very important to our bodies. The primary function of the sterols is to regulate the amount of cholesterol in the body. It also works as a precursor for testosterone.

The most important thing we need to know about the structure of steroids is that they contain two parts. One is hydrophilic, and the different is lipophilic. Lipophilic means it has a fat-like property and is soluble in the fat. It can be removed by using oil and water.



I hope this article has been helpful for you and that you understood the structure of sterols and how they work. Now, it is time to know more about sterols’ benefits and function.



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