Use of shampoos or soaps with harsh chemicals leads to excess dryness of hair and also depletion of melanin, thus resulting in graying. Excess dryness of scalp, due to reduced production of oil from the oil glands of scalp is also responsible for
Chemical hair dyes and hair products, even shampoos, can contribute to premature hair graying. Many of these products contain harmful ingredients that decrease melanin. Hydrogen peroxide, which is in many hair dyes, is one such harmful chemical.
Do not use harsh shampoos: The harsh chemicals in shampoos and conditioners are known to affect hair follicles, causing hair fall and greying. Shampoos contain several chemicals like hydrogen peroxide which can contribute to premature greying of hair.
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.
SODIUM LAURYL SULFATE (SLS)
This cheap synthetic product is capable of stripping out the natural oils from the scalp leaving it dry and rough. Long term use of SLS can even create serious scalp problems including baldness. Talking about grey hair, it is already dry.
Though, ageing is the primary reason of grey hair but premature greying of hair in early 20's or 30's is now common. Genetic factors, stress, lack of nutrition, chemicals, smoking or any underlying disease like anemia can also lead to premature greying of hair.
Genetics
Your makeup plays a big role in when (or if) you develop white hair. 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.
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.”
Hair lightening
According to these articles, the citric acid in lemon juice is a natural bleach, or oxidizing agent. It whitens hair by chemically reducing your hair's color pigment, or melanin. When exposed to the sun, the citric acid accelerates the bleaching process.
Use of shampoos or soaps with harsh chemicals leads to excess dryness of hair and also depletion of melanin, thus resulting in graying. Excess dryness of scalp, due to reduced production of oil from the oil glands of scalp is also responsible for early graying.
When you first use dry shampoo, you might be surprised to see a powdery white residue on your hair. But don't panic—it's completely normal. Just wait two minutes for your hair to absorb the dry shampoo, then work it through with a comb, a brush, or your fingers, and the white-powder look will vanish.
There are no treatments that are proven to treat (or reverse) gray hair. For now, the best choice for people who want to cover their gray hair is to use hair coloring, which can be temporary or permanent depending on the type.
As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color — like gray, silver, or white — as it grows.
Amongst the many myths that persist around hair washing, the most common one is that over-shampooing leads to hair fall. In reality, it is not the practice of washing your hair, but the chemical-based shampoo you use that may make your hair dry and brittle, eventually leading to hair fall.
"Your hair follicles have pigment cells that make melanin. Melanin is a chemical that gives your hair its color. As you age, these cells start to die. When there is a lack of pigment, new hair strands grow lighter and eventually turn to shades of gray, silver, and eventually white," Friese explains.
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.
White hairs are typically a sign of aging, but they're not timekeepers — they can pop up whenever they feel like it. That being said, it's common to notice white or gray hairs in your 30s or 40s.
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, medications, your gray hair cannot be reversed.
Drink six ounces of fresh amla juice every day or massage your hair with amla oil one time each week. Amla is also known as Indian gooseberry. Black sesame seeds (Sesamum indicum). Two to three times a week, eat a tablespoon of black sesame seeds to slow down and possibly reverse the graying process.
Sulfates: they increase skin sensitivity and strip hair of their natural oils, causing dryness. Parabens: they increase the risk of skin cancer. Phthalates: they are dangerous to the environment and cause hormonal disruptions. Formaldehyde: is carcinogenic and easily absorbed by the skin.