Arey co-founder and Trichologist Jay Small checks a client's hair health

The Best Peptides to Repigment Your Grey Hair – According to Science


Want Thicker Hair and Fewer Greys? Here’s Why Your Hair Needs Peptides

You may have heard about the benefit of peptides and collagen for your skin, but did you know they are also hero ingredients in haircare? The best peptides for grey hair not only improve the overall health of your hair, they can potentially slow, delay, and even repigment grey hair.

At Arey, my co-founder Allison Conrad and I are all about the science behind grey hair solutions. That’s why we did a deep dive into the best peptides for repigmenting grey hair. Here’s what we found:


What Are Peptides?

Peptides are the building blocks of proteins. They are the bonds that hold together the chains of amino acids that form proteins needed by your body. Peptides play a critical role in your overall wellness, including your hair health.1

Peptides occur naturally in nearly every tissue of your body. Peptides can also prompt your body to produce more collagen and elastin, which boosts your skin health and can help keep your hair’s structure strong.

You can easily boost your intake of peptides by including certain foods2 in your diet such as:

  • Fermented foods, try adding kimchi, kombucha and miso
  • Soy-based foods, like tofu and edamame
  • Bone broths, including chicken or beef
  • Whole grains, don't skip oats, and wheat
  • Legumes, including lentils and beans

Peptides are used in a wide range of nutritional, skin, and haircare products. In addition to eating a peptide-rich diet, peptides for hair health are often used topically in products that touch the scalp like our age-defying, grey hair treatment serum To The Root.


Meet PA20 – A Proven Grey Hair Reversing Peptide

Palmitoyl Tetrapeptide-20, also known as PA20, is an innovative amino acid sequence formulated to act specifically on your hair’s greying process to provide clinically proven grey hair solutions.3

We use PA20 as a core ingredient in our Mela-9™ Complex because it has been shown4 to preserve the function of your hair’s pigment-producing cells, promote repigmentation, slow, and even reverse the greying process.  


Repigmentation is a gradual process. Arey’s Mela-9™ Complex works best on hair that is less than 30% grey and it can take 3-4 months to see a change in your amount of grey head or beard hair. My beard began noticeably changing color after almost 8 months of consistent use of Arey’s Mela-9™ products Not Today, Grey, and To The Root.


Grey Hair Solutions From the Inside-Out and the Outside-In

We formulated our lightweight topical hair serum To The Root to deliver PA20 where you need it the most – your roots. To The Root is formulated to reduce the signs of aging hair as well as deliver you thicker, fuller, healthier hair. 


Like all Arey products, To The Root is vegan, clean, and fragrance-free. It is also free from gluten, parabens, phthalates and formaldehyde. It’s so lightweight and easily absorbed that it is safe for us guys to use on our facial hair without the risk of breaking out.   

Read more about Arey’s grey hair solutions for your beard 

For the best results, we recommend combining To The Root with our antioxidant-rich hair health nutritional supplement Not Today, Grey. Because we believe that the best haircare works from the inside-out and outside-in – a whole-body approach of nutritional and topical support.

We call this powerhouse grey hair treatment The System. 


How Do Collagen Peptides Thicken Your Hair?

Peptides are not only for reversing grey hair. They can also improve your hair’s overall strength and thickness. We use Hydrozoan Polypeptide-1 (vegan collagen) in our hair heat protectant Mend to protect your hair against future heat damage and to reduce the appearance of existing hair heat damage.

Hydrozoan Polypeptide-1 creates a microscopic lightweight film that protects each hair strand from heat styling damage up to 450°F



Here’s what you can expect from using Mend, our peptide-rich leave-in conditioner:

    • Thicker hair: vegan collagen (sr-Hydrozoan Polypeptide-1) plumps up each hair strand by locking in moisture.

    • Softer hair: Polyquaternium-37 moisturizes and adds volume to your hair.

    • Stronger, healthier-looking hair: moisturizing esters strengthen your hair and reduce the appearance of split ends.

    • Less frizz: Mend absorbs easily for smoother hair and fewer flyaways.

Mend leave-in conditioner delivers easily absorbed, lightweight moisture so it won’t build up or weigh your hair down. Skipping the heat tools? Air-drying after using Mend reveals your hair’s natural texture for soft, frizz-free tresses. 


Science-Backed Haircare for Your Best Hair at Any Age

I am often asked when’s the best time to start using Arey’s The System. My answer is always the same – the sooner the better. Why? Because it’s easier to prevent grey hair than it is to repigment your strands. Arey is designed to be a proactive solution to grey hair.

To keep you on track with your hair health goals we offer a 25% discount on all subscriptions. Because science+consistency = results. 

We are here for you with science-based, effective solutions. We want you to feel happy and confident with your hair. Have questions? Visit our FAQ page or email us at


Jay Small with customer

AuthorJay SmallJay Small is a sought-after hair stylist and Trichologist in Los Angeles with over 22 years of experience. His clients consist of high-profile business and creative leaders. He trained as an apprentice to the owner of Paul Mitchell and worked in education and product development for Paul Mitchell Systems. Jay is incredibly passionate about the creative process both in terms of styling hair and developing effective products.


  1. Functional Collagen Peptides