What Causes Grey Hair?

Many people believe that grey hair is hereditary, and therefore inevitable.  However, scientists have identified  the IRF4 gene that is associated with greying hair, and it only accounts for about 30% of greys. There are two main factors that cause grey hair: the decrease in melanogenesis and the increase in oxidative stress in the hair bulb. Our unique system tackles both, from the inside-out and the outside-in.

Percentage of Grey

Everyone’s hair turns grey at different ages, your percentage of grey is what is most important. Arey is a proactive solution that works best when used at the first signs of grey hair. For best results we recommend using Arey when you are 0-30% grey. Even though repigmentation is less possible when you have more than 30% grey, preservation is. The ingredients in our products can help with preserving remaining pigment, and improve common characteristics of aging hair, like coarseness and dryness.


Ideal range for delaying grey growth and possible repigmentation of new hair growth

grey hair at 5% 5%
grey hair at 10% 10%
grey hair at 20% 20%
grey hair at 30% 30%
grey hair at 40% 40%
grey hair at 50% 50%
grey hair at 60% 60%
grey hair at 70% 70%
grey hair at 80% 80%
grey hair at 90% 90%
Results may vary. Repigmentation is only possible on hairs that still have melanin in the root. Even though repigmentation is less possible when you have more than 30% grey, preservation is. The ingredients in Arey products can help with preserving remaining pigment, and improve common characteristics of aging hair, such as coarseness and dryness.

What To Expect

Hair grows an average of a half inch per month, and your hair strand starts about a half inch below the surface of scalp. Consistent use and allowing time to see results is key. Most users see results in 90 days. In the first 1-2 months most users see their scalp health improve, with hair that is more balanced, less greasy and visibly thicker and fuller. In months 3-4, this is when you really start to see healthier hair, less grey growth, and the start of repigmentation.

illustration of hair growth

Tracking Your Progress

We recommend taking before and after photos to document your Arey journey. In order to accurately assess your progress, it’s important to see a few months of hair growth. In the first 1-2 months, Arey is working to treat the half an inch of hair growing under the scalp. Months 3-4 are where you’re likely to see less grey hair growth and the start of repigmentation. Below are some guidelines on how to take the best before & after photos.


Photograph the side of your head. This makes it difficult to see new hair growth.

illustration of hair growth


Take your before and after photos at the exact same angle and in the same light.

illustration of hair growth

How Repigmentation Works

The appearance of grey color in a hair shaft is due to a gradual loss of melanin. With the loss of pigment level, the color of the hair becomes increasingly light and the hair shaft appears grey. The stimulation of melanocytes, and the repigmentation process, can occur as long as some melanocytes are still present in the hair bulb. The irreversible final step of the hair greying process is a completely white hair shaft, this is when there is a loss of all melanocytes.

What is Oxidative Stress?

Oxidative stress is a phenomenon caused by an imbalance between production and accumulation of oxygen reactive species (ROS) in cells and tissues and the ability of a biological system to detoxify these reactive products. Oxidative stress can come from UV rays, cigarette smoking or the use of on scalp hair dye. Over exposure to oxidative stressors can cause the cellular function to be disrupted, which can lead to depigmentation (grey hair) and other common signs of aging hair.

Hair Growth Cycles

Our hair strands have a complex lifespan that is unique to every strand. The average person has 100,000 hairs on their head and each of those hairs will go through the same life cycle at different times. Being able to support each stage the hair goes through is key, even when hair sheds that is a positive part of this cycle making way for new growth.

The Arey System

The Arey System includes Not Today, Grey, a daily supplement which supports healthy melanin production with its unique science backed combination of 13 ingredients that increase cell turnover, defend against free radicals and oxidative stress, and improve the protein structure of your hair from the inside-out.

  • absorb

    Vitamins B6 and B9 optimize body function, setting a foundation for the formula's other ingredients to take effect.

  • create

    Vitamins B6 and B9 optimize
    Vitamin B5 promotes cell turnover and Selenium builds a defense against free radicals.

  • energize

    Vitamins B6 and B9 optimize
    Vitamin B12 and Fo-ti fuel Melanin production, while Iron supports the production of red blood cells.

  • protect

    Vitamins B6 and B9 optimize
    Paba, Vitamin D & Copper help to protect hair from premature grey, while Vitamin B7 improves the protein structure of hair.

Our proactive and clean topical serum To The Root™ is formulated to reduce the signs of aging hair and deliver thicker, fuller, healthier hair. To The Root utilizes The Mela-9™ Complex, our patent-pending blend of antioxidants, extracts and a clinically efficacious peptide that can promote melanogenesis while reducing oxidative stress in the hair root. This results in the slowing of grey hair, and in some instances helps with repigmentation by stimulating MC1-R (Melanocortin 1 Receptor).

  • stimulate

    Our clinically efficacious peptide helps with repigmentation by stimulating the MC1-R (Melanocortin 1 Receptor).

  • safeguard

    Antioxidants including Fo-Ti and sesame seed help reduce oxidative stress in the hair bulb.

  • nourish

    Extracts from wasabi, ginseng, soybeans and hops provide nourishment to the roots and promote cell turnover to create healthier hair.

  • volumize

    Pantothenic acid (B5), provides anti-inflammatory properties and is involved in activating the proliferation of cells in the skin barrier and also helps bind water to the skin, adding shine.

Discover the Benefits of Science-based Haircare