Gray hair grows when hydrogen peroxide builds up in your hair follicle. "This causes hair to bleach itself from the inside out," says Debra Jaliman, MD, a dermatologist in New York and spokesperson for the American Academy of Dermatology. Gray hairs are thicker and wirier, so your hair gets coarser as they multiply.
Even teenagers and people in their 20s may notice strands of white hair. The human body has millions of hair follicles or small sacs lining the skin. The follicles generate hair and color or pigment cells that contain melanin. Over time, hair follicles lose pigment cells, resulting in white hair color.
White (nonpigmented) hair is thicker than black (pigmented) hair. The growth rate of white hair is also significantly higher than that of black hair.
Yes, gray hair also grows faster and for a longer time than black hair. A study of scalp and eyebrow hair revealed that the genes responsible for producing two of the main structural proteins in hair are twice as active in white hair as in black hair.
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.”
There's a commonly held belief that if you pluck it, many more grays will follow in its wake. This is actually a myth—what you do to a single strand can't spread like contagion.
A new study shows that stress really can give you gray hair. Researchers found that the body's fight-or-flight response plays a key role in turning hair gray. Your hair color is determined by pigment-producing cells called melanocytes.
“While gray hair feels coarse and rough, the structure of the strand hasn't actually changed. When those melanin-producing cells run out of steam, the hair follicles also produce less sebum (the natural oils that hydrate hair) which makes gray hair to be drier, giving it that wiry texture,” she explains.
White hairs are completely void of any pigment. Specialist Trichologist Anthony Pearce said this loss of pigment occurs within the hair follicle, which is why greys tend to turn up and stay in the one spot, rather than popping up randomly each time you pluck.
Despite the claims made online and by product marketers, it's not possible to reverse white hair if the cause is genetic. Once your hair follicles lose melanin, they can't produce it on their own. As melanin production slows, your hair turns gray, and then white when melanin production has completely stopped.
More Breakage
It's simple fact of life that gray hair is more fragile and finer. This is due to the cuticle being thinner, which provided a protective layer, than when your hair had pigment. So using a delicate hand when styling and avoiding hot tools is important.
This can lead to your gray hair to fall off as new hair is attempting to grow where hair is already there. Paired with the fact that gray hair is usually weaker than normal hair, you'll see a lot of shedding of gray hair.
A gene variation of EDAR that arose about 30,000 years ago seems to give some people thicker strands of hair. More than 90% of Han Chinese, 70% of Japanese and Thai people, and 60% to 90% of Native Americans carry the “thick hair" version of the gene.
Premature graying hair and hair loss can be linked. However, one is not a sign that the other will occur. And, if both are happening, there may not be a link. In other words, it is important to look at other factors and determine what cause may be impacting your hair the most.
Genetics
If you notice white hair at an early age, it's likely that your parents or grandparents also had graying or white hair at an early age. You can't change genetics. But if you don't like the way your gray hair looks, you can always color your hair.
When you pull out your hair "by the root," you may observe a transparent swelling called the "bulb." The area above the bulb usually seen on a plucked hair is the root sheath, the growing area of a hair. The size of the hair bulb on a plucked hair varies with the phase of growth the hair was in.
Gray hair is thinner than hair with natural color because its cuticle is thinner. Your hair needs that natural protection from water, ultraviolet rays from the sun, humidity, chemicals, and heat styling. Without that barrier, your hair loses water. So your gray will feel dry, fragile, and coarse.
You get grey hair when not all of your hair has turned white, meaning that there is still dark colored hair mixed with the white hair, while you get white hair when all of your hair has turned white. 2. With grey hair, not all of the hair lacks melanin, while with white hair; all of them no longer get enough melanin.
The pigment in our hair is caused by melanin— the same pigment that is also responsible for our skin color. Gray hair is caused by a loss in melanin, whereas white hair does not have any melanin at all. As you age, your hair produces less and less melanin that leads your hair to appear gray, and then eventually white.
The timing between dyes, according to Lint, is roughly every four to six weeks. If you're stretching that time gap pretty thin, however, there are methods to cover your gray roots in the meantime. "There are lots of products, such as powder or makeup, that cover your gray and then wash out when shampooed," says Lint.
Typically, white people start going gray in their mid-30s, Asians in their late 30s, and Blacks in their mid-40s. Half of all people have a significant amount of gray hair by the time they turn 50.
Does lack of sleep send my hair grey or white? Lack of sleep can have a negative effect on many aspects of the body, not only can it lead to tiredness and lack of concentration, but longer term effects such as your immune system and stress. Stress has been proven to cause grey hair as mentioned above.
It can be a shock to find your first gray hairs on your head, especially if you're only in your 20s. But women's expert Dr. Kirtly Parker Jones says a few gray hairs is perfectly normal, even for women in their late 20s and early 30s. However, stress, genetics and other factors can play a role.
Luke's Medical Center, points out that apart from aging, other causes of white or gray hair include genetics, stress, lack of nutrients, and autoimmune disorders. So if your parents developed white hair early, chances are you are prone to premature graying, too.
“But the hairs that have been gray for 30 years are probably unlikely to be reversible,” Picard noted. Any graying reversal is likely temporary: As a person gets older, the hair is going to pass the threshold again as part of the aging process and go gray — this time, for good.