What Are The Best Peptides for Hair Growth?

Hair growth is a complex process that involves many factors, including genetics, nutrition, and hormone levels. Peptides may benefit hair care products because they reconstruct the inner bonding of the hair follicle and restore their health.

Determining the most suitable peptide for your needs is crucial for achieving the desired hair growth results. Let us look in-depth at peptides and their role in hair growth and explore the ideal peptides for hair growth, how they work, and factors to consider when selecting the correct peptide.

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What are peptides?

Peptides are minuscule chains of amino acids that play a critical role in our bodies, including hair growth.

Peptides are the building blocks of proteins. These chains typically consist of two and fifty amino acids linked by peptide bonds.

Peptides are smaller than proteins, making them more easily absorbed by the body. They are available through various natural sources, including plants, animals, and microorganisms.

How peptides work for hair growth

Peptides work in several ways to promote hair growth. One way is to circulate blood to the hair follicles, giving them the nutrients and oxygen they need to grow hair healthily. Peptides might also prompt the body to produce more collagen and elastin, which help keep the hair’s structure strong.

In addition, some peptides, such as DHT, may help balance hormone levels, which might contribute to preventing hair loss. Peptides might also protect the hair and scalp from damage by reducing inflammation. For example, the copper peptide GHK-Cu may help improve scalp health and hair density by reducing inflammation and oxidative stress.1

Syringe and a vial with blue fluid.

Factors to consider when choosing a peptide for hair growth

Choosing the correct peptide is essential for achieving the desired hair growth results.

Type of peptide

Peptides come in many forms, such as oral supplements, shampoos and conditioners, serums, powders that can be mixed into drinks, and injectable shots. Each of these options provides different benefits that might help you improve the health of your hair in different ways.

For example, shampoos or serums may help your scalp stay hydrated and help protect the follicle.

pills and caplets

Injectable shots act at a cellular level and may help promote healthy hair from within. Speak with your doctor about choosing the right peptide to help you reach your health goals.


It is essential to look for hair growth products with high-quality peptides and other helpful ingredients. Keep an eye out for clinically tested products that have proven effective, and pay close attention to the other ingredients in the product, such as vitamins and minerals, that may help support healthy hair growth.

pills, vitamins, minerals and herbs in bowls on a green table


Hair-growth products feature peptides in different concentrations, and taking the correct amount is imperative to avoid side effects. If you are using a hair growth product with peptides, follow the instructions on the label carefully, and consult a healthcare professional if you have any concerns.

syringe and vials on white background

Top peptides for hair growth and their benefits

Copper peptides

Copper peptides are often used in hair growth products because they may accelerate hair growth and strengthen and protect hair from damage. Copper peptides are a type of peptide that includes the mineral copper, which is a vital nutrient for hair growth.

Copper peptides maneuver more blood to the hair follicles and boost the production of collagen and elastin, which help keep the hair’s structure strong.

3 syringes on a red background

Copper peptides may also provide antioxidant and anti-inflammatory benefits, protecting the hair and scalp from damage.

One of the most prevalent copper peptides for hair growth is GHK-Cu. GHK-Cu is a type of copper peptide that may present anti-aging and wound-healing properties, making it a popular choice for hair growth products.2

GHK-Cu could help promote hair growth, improve hair density, and reduce shedding. GHK-Cu may also help improve scalp health and reduce oxidative stress and inflammation, contributing to hair loss.

Biotin peptides

Biotin is a critical B vitamin responsible for healthy hair growth. Biotin aids in strengthening hair and preventing breakage, improving hair quality and texture. Biotin peptides are a type of peptide that includes biotin, which may help promote hair growth and improve hair health.

hand with a glove holding syringes

Keratin peptides

Keratin is a protein that provides structural support to the hair.3 Keratin peptides are a type of peptide that includes keratin, which may help strengthen hair and prevent breakage. Keratin peptides may also improve hair texture and shine.

A concierge doctor holding up three syringes on their tips while having a white glove

How to use peptides for hair growth

Peptides are available in a few different formats for hair growth.

Topical application: Peptides in hair growth products can be applied directly on the scalp and hair. These products typically include shampoos, conditioners, serums, and hair masks. Topical application is the most common way to use peptides for hair growth, as it is non-invasive and convenient.

Injection: Injecting peptides directly into the body is another way to use peptides for hair growth. This option works at the cellular level.

Oral supplements: Oral supplements containing peptides are also available for hair growth. These supplements typically come in capsules or tablets and can be taken orally. Oral supplements are a convenient way to use peptides for hair growth. However, they may not be as effective as topical applications or injections because peptides typically break down within the digestive system.

Peptide side effects and precautions

Even though peptides are generally considered safe, knowing the possible side effects and how to be safe when using them to grow hair is crucial.

Peptides can cause allergic reactions in some people, resulting in skin irritation, a rash, or hives. If you experience these symptoms, discontinue use and consult a healthcare professional.


Peptides may be a practical, multifaceted approach to fostering healthy hair growth. If you want to use peptides for hair growth, we recommend consulting a healthcare professional and doing thorough research to find the best product for your needs.

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[1] Protective effects of GHK-Cu in bleomycin-induced pulmonary fibrosis via anti-oxidative stress and anti-inflammation pathways. Ma WH.

[2] The potential of GHK as an anti-aging peptide. Dou Y.

[3] Keratin-based peptide: biological evaluation and strengthening properties on relaxed hair. Fernandes MM.

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