Unlocking the Mysteries of Keratin Pigment

Posted May 29, 2023 by Anusha ‐ 4 min read

Have you ever wondered what gives our hair and nails their remarkable colors? The answer lies in a fascinating substance called keratin pigment. Keratin, a fibrous protein, forms the building blocks of our hair, nails, and skin. While we often associate keratin with strength and structure, it also plays a vital role in determining the pigment that brings life and variety to our appearance.

Understanding Keratin Pigment

  • Keratin pigment refers to the natural coloration found in our hair and nails, which results from the presence of pigments within the keratin structure.

  • The primary pigments responsible for our hair and nail colors are melanins.

  • Melanin is produced by specialized cells known as melanocytes, which are found in the hair follicles and nail beds.

  • These pigments contribute to the vast range of hair and nail colors observed in humans, from deep browns and blacks to vibrant reds, blondes, and even gray or white shades.

Types of Melanin and Their Effects

  • Melanin comes in two primary forms: eumelanin and pheomelanin.

  • Eumelanin is responsible for dark brown to black hair and is also found in varying concentrations in darker skin tones.

  • Pheomelanin, on the other hand, is responsible for lighter hair colors, such as red and blonde, and is present in varying levels in fair skin tones.

  • The ratio of eumelanin to pheomelanin in our hair and nails determines the overall color we exhibit.

Factors Influencing Keratin Pigment Expression


  • Our genetic makeup plays a crucial role in determining the type and amount of melanin produced by melanocytes.

  • Genes control the production of specific enzymes involved in melanin synthesis.

  • Variations in these genes can result in a wide spectrum of hair and nail colors within different populations and individuals.

Age and Hormones

  • As we age, the melanocyte activity can decrease, leading to a decline in melanin production.

  • This reduction often results in gray or white hair.

  • Hormonal changes, such as those occurring during puberty or pregnancy, can also influence the production and distribution of melanin, resulting in temporary changes in hair color.

Environmental Factors

  • Environmental factors, such as exposure to sunlight and chemical treatments like hair dyes, can affect the expression of keratin pigment.

  • Ultraviolet (UV) radiation from the sun can break down melanin and alter its color, leading to sun-bleached or faded hair.

  • Additionally, certain chemicals found in hair products can penetrate the hair shaft, changing its natural color.

Health Conditions

  • Certain medical conditions, such as albinism or vitiligo, can impact the production of melanin, resulting in partial or complete absence of pigment.

  • These conditions highlight the importance of melanin in protecting the skin and eyes from harmful UV radiation.

Some key nutrients and foods that can support keratin production

Protein-Rich Foods

  • Keratin is a type of protein, so consuming adequate amounts of protein is essential.

  • Include lean meats like chicken, turkey, and fish, as well as plant-based sources such as beans, lentils, tofu, and quinoa.

  • Eggs, dairy products, and nuts are also good sources of protein.

Omega-3 Fatty Acids

  • Omega-3 fatty acids are beneficial for overall hair and nail health.

  • They can be found in fatty fish like salmon, mackerel, and sardines.

  • Plant-based sources include flaxseeds, chia seeds, walnuts, and avocados.


  • Biotin, a B-vitamin, plays a role in keratin production.

  • Good sources of biotin include eggs, almonds, sweet potatoes, spinach, broccoli, and whole grains like oats and brown rice.

Vitamin C

  • Vitamin C is important for collagen synthesis, which is a key component of healthy hair and nails.

  • Include citrus fruits, berries, kiwi, bell peppers, tomatoes, and leafy greens in your diet to ensure an adequate intake of vitamin C.


  • Iron deficiency can lead to hair loss and brittle nails.

  • Include iron-rich foods such as lean red meat, poultry, fish, legumes, spinach, tofu, and fortified cereals in your diet.

  • Pairing iron-rich foods with vitamin C sources can enhance iron absorption.


  • Zinc contributes to hair growth and tissue repair, including the production of keratin.

  • Good sources of zinc include oysters, lean meats, poultry, nuts, seeds, whole grains, and legumes.

Vitamins A and E

  • Vitamin A helps in the production of sebum, which nourishes the scalp and keeps hair healthy.

  • Sources include carrots, sweet potatoes, spinach, kale, and mangoes.

  • Vitamin E acts as an antioxidant and can be found in nuts, seeds, spinach, and avocado.


  • Hydration is essential for healthy hair and nails.

  • Drink an adequate amount of water throughout the day to keep your body hydrated, which helps maintain the moisture balance in your hair and nails.

The Fascinating World of Keratin Pigment

  • Keratin pigment not only adds aesthetic appeal to our appearance but also serves various functional purposes.

  • The melanin pigments found in hair help protect the scalp and hair follicles from the damaging effects of UV radiation.

  • In addition, melanin contributes to the mechanical strength and elasticity of hair and nails, playing a crucial role in their overall health and resilience.

Subscribe For More Content