Amino Acids: How To Boost Hair Growth After 40s?

Are you struggling with hair loss or hair thinning issues? Looking for one natural solution that solves your problem? Here you find the answer to the question. The simple solution is amino acids.

Many people are not aware of the role of amino acids in hair growth. They are the building blocks of protein, which are the primary component in hair strands.

This is why amino acids are an integral and essential part of healthy hair growth.

When struggling with hair loss, it’s important to know how different amino acids are vital in the hair growth process. So you can start consumption accordingly to boost your hair growth.

To solve your hair loss problem simple way, we are going to give you a detailed guide on types of amino acids for your ready reference.

This guide will help you get the best information and products for your healthy hair.

Disclaimer: Included some Suitable Product Affiliate Links that are useful to solve your Health Issues. Read Detailed Disclaimer at the bottom.

amino acids for hair growth

What to know about Amino Acids so you will get better hair growth?

It is important to understand what amino acids are and how they work. Especially, when they are important to hair growth and hair health.

They have four main elements: hydrogen, oxygen, nitrogen, and carbon.

Those are the foundation of protein. This is why it’s vital to understand how they are inextricably linked to the hair growth process.

Each strand of hair on your scalp is made out of keratin, which is a type of protein. Amino acids play an important role in the maintenance and repair of scalp cells.

It also plays vital biochemical processes within the body that are reliant on proteins.

Outside the hair health, these acids provide cells within the human body with the material they need. So our body cells can maintain their structure.

Amino acids are also essential for the metabolic function of the body. With increased metabolism, you are able to maintain overall health including hair growth.

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What are the Types of Amino Acids?

They are divided into two main categories. One is essential and the other is non-essential amino acids.

Over time, this list has been continually modified as more research has been done into the roles of individual amino acids.

There is a total of twenty types of amino acids are found in the human body.

Below is a breakdown of the essential versus non-essential amino acids list. You will also find which are fall into each category.

How Many Essential Amino Acids Are There?

The acids which our body cannot synthesize on its own and must be obtained through diet or supplements are called Essential Amino Acids.

There are nine amino acids that fall into the essential category. If you don’t get the required levels of essential amino acids, it can have an adverse effect on your hair health.

Our bodies haven’t the ability to store excessive essential acids like fat. So, you have to obtain a consistent supply from outside each day. Below is the list of nine essential amino acids.

  1. Isoleucine
  2. Histidine
  3. Leucine
  4. Methionine
  5. Lysine
  6. Phenylalanine
  7. Tryptophan
  8. Threonine
  9. Valine

How many non-essential amino acids are present?

The acids which our bodies are capable of producing are called non-essential amino acids.

Don’t misunderstand the word non-essential. It only means we don’t require getting it from outside.

Our body can produce non-essential amino acids by utilizing chemicals present in the body. Below is a list of the eleven non-essential amino acids.

  1. Alanine
  2. Arginine
  3. Asparagine
  4. Aspartic Acid
  5. Cysteine
  6. Glutamic Acid
  7. Glutamine
  8. Glycine
  9. Proline
  10. Serine
  11. Tyrosine

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How Amino Acids helps the Hair Growth Process?

Actually, above listed acids play many different roles in the human body. However, Hair Growth Process is mostly benefited by amino acids.

As mentioned earlier, they are an essential component in the production of keratin.

This is the primary building block in hair strands. Hair keratin contains almost sixteen of the various amino acids.

They are also aided in the creation of red blood cells in the body. Red blood cells aids in the delivery of oxygen and required nutrients to hair follicles on the scalp.

That improves hair health and stimulates healthy hair growth.

If you want healthy, thick shiny hair, it is important getting all the required quantity each day. Obtain it from food or dietary supplements.

Which are the Top Amino Acids that Benefits Hair Growth?

As of now, you know, Amino acids play a key role in the production of healthy hair follicles. It also helps you to maintain overall hair health.

For your ready reference, we have compiled information about the top amino acids for hair growth.

Keep in mind, these are not the only one that plays a role in the hair growth process, but a handful of the most closely linked.

Below is an overview, how each of these amino acids affects your hair growth process.


Arginine plays a significant role in hair growth. Also known as L-Arginine, is a precursor to nitrogen oxide.

This is especially important to keep in mind that are deficient in nitrogen oxide or that are eating a diet that supplies only minimal nitrogen oxide.

The reason that Arginine’s ties to nitrogen oxide are important is that arginine helps to generate nitrogen oxide. That aids in the opening of potassium channels within scalp cells.

When these potassium channels opened, there are a number of other reactions that occur within the body.

The opening of potassium channels within cells triggers blood vessels to dilate.

This facilitates the movement of blood through the blood vessels and improves circulation.

This improvement in blood flow and circulation causes a sufficient blood supply to hair follicles. As a result, it stimulates hair growth.

Arginine mostly found in fish, wheat germ, sunflower seeds, coconut, sesame seeds, hazelnut, and cashews.


Tyrosine, which is also called L-Tyrosine. This is another non-essential amino acid that plays a crucial role in the hair growth process.

Tyrosine is integral in the production of melanin. This is responsible for the coloration of the skin and hair pigments.

In addition, Tyrosine also aids in the regulation of hormones within the adrenal, thyroid, and pituitary glands.

In some cases of hair loss or hair thinning, individuals may find that their hair color will also be affected.

This can be caused by stress, so it is important to keep Tyrosine levels stable within the body. With an ample supply of Tyrosine, melanin production occurs consistently.

Tyrosine mostly found in pumpkin seed, Lima beans, dairy and soy products, almonds, and fish.


Methionine sometimes called L-Methionine is a vital amino acid for many functions including hair growth. It must be consumed through food or herbal supplements.

Methionine is derived from sulfur, which is necessary to manufacture keratin in the hair shaft.

In addition, Methionine also aids the body in the production of creatine. This type of protein is important for muscle growth and energy.

Methionine also boosts collagen production within the body. That improves the strength of the hair shaft and the appearance.

Methionine also works as an antioxidant that may aid in the reduction of hair loss or hair thinning.

In addition, Methionine aids in the prevention of fat build-up and helps to break down fat.

This process aids in increasing circulation to the hair follicles and scalp and arteries.

Food sources that are rich in Methionine include Brazil nuts, fish.


Cysteine is also referred to as L-Cysteine.  Contributes to the protein formation process that helps to build hair strands through keratin.

Cysteine has the ability to form disulfide bonds in the body. These disulfide bonds are what bind the keratin strands within the hair together.

This process allows the hair strand to have fibrous properties. That allows it to retain moisture and nourish the hair follicles. This aids in the prevention of dry and itchy scalp.

In addition, Cysteine also plays a key role in upholding the thickness and texture of the hair.

Brussels sprouts, broccoli, chicken, and wheat germ are the food sources of Cysteine.

To understand the importance of Cysteine in hair growth, let’s understand hair construction.

Construction of Hair

Each hair strand has three layers called cuticle, cortex, and medulla. The cuticle is the outermost layer of the hair follicle that surrounds the medulla and the cortex.

The cortex then surrounds the medulla. This comprises the center of the hair shaft. The medulla is the area of the hair that controls the natural thickness of hair.

The cortex is the most prominent layer as it makes up to 90% of each hair strand. The cortex is made up of keratin molecules that have joined together and gives the hair strands strength.

Each of the fibrous filaments of the bound keratin molecules is comprised of roughly 75% Cysteine, making this amino acid an essential part of the hair growth process.

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The Importance of Diet and Herbal Hair Supplements

One of the best ways to get the amino acids your hair needs is to eat rich amino acid foods.

Most people don’t realize how significantly diet affects hair health and hair growth.

Your hair health depends on the nutrients you ingest and that your body naturally produces.

When your body becomes deficient it adversely affects overall health including hair loss, hair thinning, and hair health.

Some individuals may also become deficient in certain amino acids, vitamins, or nutrients because of a medical condition.

For example, individuals that become anemic, or Iron deficient, can sometimes experience hair loss or hair thinning as a result.

To rectify this, it is important to eat foods that are rich in Iron and add a daily Iron supplement to the diet to prevent anemia from occurring.

Individuals can also become deficient in amino acids, which can have a ripple effect on the hair growth process.


It is evident there are many hair benefits of amino acids but it is also beneficial to incorporate an herbal hair supplement to help improve hair health and promote healthy hair growth.

This is a simple, cost-effective way to boost hair growth and health. Before beginning an herbal supplement, be sure to consult a doctor.

We hope this guide helps you a lot in your hair growth process. Do share it with others to get the benefits of amino acids in hair loss.

Which foods or Supplements you are taking for faster hair growth? Comment below.

How Amino Acids Help You Grow Healthy Hair Fast

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This Post Has One Comment

  1. Patricia

    This is a great article. It is easy to understand and very informative.

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