There isn't a lot of medical data to back it up, but some research does show that
It turns out that, among people who are nutrient deficient, supplementing with vitamin B-5, high-dose para-aminobenzoic acid, iron, or vitamin B-12 might help reverse gray hair.
Magnesium has a direct impact on hair growth. It regulates hair follicle production and the overall hair growth cycle, making it an essential mineral for healthy hair growth. When magnesium levels are low, hair follicles go into a resting phase and stop producing new hair, leading to hair loss.
Vitamin deficiencies
Any deficiencies of vitamin B-6, B-12, biotin, vitamin D, or vitamin E can contribute to premature graying. One 2015 report in the journal Development notes various deficiency studies on vitamin D-3, vitamin B-12, and copper and their connection to graying hair.
With the right nutrients such as B vitamins, vitamin C, L-methionine, copper, folate, calcium, iron, zinc, and antioxidants, you can stop further greying of hair.
Vitamin B-12 is the most common culprit, with folate, copper, and iron deficiencies increasing your risk, too. Dietary supplements may help these deficiencies and you might see your natural hair color start to grow back after several weeks.
Specific minerals are needed by the melanocytes to make pigment (a process called “melanogenesis”), such as copper, zinc, iron and calcium (R,R). Other important minerals for healthy hair are selenium and magnesium. People who are deficient in these important minerals have more risk of their hair turning gray.
There are no treatments that are proven to treat (or reverse) gray hair. As researchers learn more about how the graying process happens, they may develop effective medications and treatments for gray hair.
Although this may seem like a permanent change, new research reveals that the graying process can be undone—at least temporarily. Hints that gray hairs could spontaneously regain color have existed as isolated case studies within the scientific literature for decades.
Vitamins B6 and B12 have also been proven to boost melanin production. Goddard says that vitamin B6, also known as pyridoxine, has been found to trigger the production of enzymes and chemical reactions that boost the metabolism of the hair proteins (keratin and melanin) in the hair follicles.
Too much magnesium from foods isn't a concern for healthy adults. However, the same can't be said for supplements. High doses of magnesium from supplements or medications can cause nausea, abdominal cramping and diarrhea.
The benefits of magnesium supplementation in healthy individuals aren't clear, but Dr. Nassar says that taking a magnesium supplement every day likely isn't unsafe for most people. Just be sure you're not taking too much magnesium. The maximum dietary allowance for most adults is around 400 mg or less.
"Magnesium helps improve your skin's overall appearance, reducing acne and other skin disorders by lowering cortisol levels, stabilizing hormonal imbalances, and improving cellular processes," says Dendy Engelman, a dermatologist in New York City.
Melanin deficiency is associated with vitamin deficiency. That's why you need to increase your vitamin intake through your food or vitamin supplements. Vitamin A, C and B12 are the most needed vitamins to increase the melanin production in your hair.
Some studies have demonstrated that grey and ageing hair can recover its original colour when nourished by diets rich in zinc and supplements formulated with this element.
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.
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.
Grey hair and genetics
The average age for grey hair varies greatly, and one of the main causes of grey hair in your 20s is genetics. The age at which a person's hair turns grey is influenced by the IRF4 gene, and one specific variant (rs12203592) is a marker for premature greying.
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.
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.
It's most common for graying to begin in your 30s, though some people spot a few grays in their 20s. If you think you're going gray unusually early, there are a number of possible reasons why. Smoking, for one, has been linked to the early onset of gray hair.
Low copper levels can lead to premature graying, according to one 2012 study. Good food sources of copper are beef liver, lentils, almonds, dark chocolate, and asparagus. These are superfoods for white hair, helping in its reversal.
They found that noradrenaline, also known as norepinephrine, was key to stress-induced hair graying. By injecting noradrenaline under the skin of unstressed mice, the researchers were able to cause melanocyte stem cell loss and hair graying. Noradrenaline is produced mostly by the adrenal glands.
Functions of copper against greying hair
Melanin can only be produced by melanocytes in the presence of the enzyme tyrosinase, and it is precisely copper that catalyses this enzymatic reaction. Taking supplements that contain this mineral is therefore a very effective way of helping protect against greying hair.
The odds of premature graying depend on how your hair follicles produce melanin. Sometimes, stress, nutritional deficiencies, and other lifestyle factors can halt melanin production. Once these issues are reversed, melanin may be restored.