However, the rate of hair colour loss is largely determined by your genes. The chances are that you will experience premature greying if your parents do. However, certain nutritional deficiencies and underlying medical conditions may play a role. In these cases, yes, white hair can turn black again.
And while it may seem intuitive that stress can accelerate graying, the researchers were surprised to discover that hair color can be restored when stress is eliminated, a finding that contrasts with a recent study in mice that suggested that stressed-induced gray hairs are permanent.
Usually, our hair will turn darker because eumelanin production increases as we age (until we go gray, that is). And because some genes are not switched on until triggered by the hormones first released during puberty, we might not show our “true” natural hair color until adolescence.
Although the primary cause of premature hair graying (PHG) is considered to be genetic, certain environmental factors also play a role. Trace element deficiencies such as Vitamin B12, Vitamin D3, and calcium may also be associated with PHG.
Segmented heterochromia in scalp hair refers to a hair condition resulting in alternating dark and light segments, which predominantly occurs in patients with iron-deficiency anaemia (1, 2).
Premature graying may be reversed with vitamin B12 supplementation only if vitamin B12 deficiency is the cause. If you are graying due to other factors, such as genetics, zinc deficiency, and medications, your gray hair cannot be reversed.
Protect Your Hair
Environmental factors such as chlorine, sun and mineral deposits in water can also damage or discolor white hair. Wear a hat when spending long periods of time in the sun to protect hair from UV rays that can cause discoloration.
Vitamin A, C and B12 are the most needed vitamins to increase the melanin production in your hair. Add citrus fruits like oranges, grapes, pineapple, and melon to your diet. Also eat vegetables like potatoes, carrots, beans, etc. Non vegetarians can try adding red meat, chicken liver, fish, and eggs to their diet.
You may have heard this before, but grey hair can turn black again naturally. It's a myth that all colouring will go away if you bleach it multiple times or put chemicals on your head!
Changes in age, nutrition, temperature, sun exposure and various other factors can cause our bodies to change the amounts or types of hormones we make. The genes for making melanin might turn on or off over a lifetime, causing your hair color to change.
“Eumelanin production increases as we age, and as we age we tend to go grey. Therefore hair may get darker before the greys take over,” she explains.
Gray hair comes down to melanin, or rather the lack of melanin. Melanin is the pigment that gives hair its color. Gray hair has reduced melanin, while white hair completely lacks it. This occurs because of a gradual decline in the number of stem cells that mature to become melanin-producing cells.
Stress can cause hair to gray prematurely by affecting the stem cells that are responsible for regenerating hair pigment. The findings give insights for future research into how stress affects stem cells and tissue regeneration.
Vitamin D
When there isn't enough vitamin D in your body your hair may turn grey or white. One study published in The International Journal of Trichology found that children who experienced premature hair greying had low vitamin D levels.
Dr. Kraleti doesn't recommend plucking or pulling the hairs out. “If there is a gray hair you must get rid of, very carefully cut it off. Plucking can traumatize the hair follicle, and repeated trauma to any follicle can cause infection, scar formation or possibly lead to bald patches.”
Foods to increase melanin in the hair
Copper-rich foods such as various kinds of nuts, mushrooms and meat liver also promote follicular melanin synthesis. Sources of vitamin A, C, and E including carrots, papaya, eggs, citrus fruits, sunflower seeds, almonds, peanuts and pistachios can improve the health of your hair.
If genetics or aging is the cause, nothing can prevent or reverse the process. However, treating graying hair could allow color pigmentation to return if the loss is due to a medical condition.