White Hair at Young Age: Causes, Tests and What Helps

Imagine getting ready for a family function when you notice something unexpected in the mirror: a white strand of hair right near your forehead. You're only 24, so naturally, you wonder why it's happening already. Your mother blames stress, someone suggests oiling your hair more often, and suddenly everyone has a theory. But what actually causes white hair at a young age? Is it something you've inherited, or could your diet and lifestyle be playing a part?

Finding a few grey or white strands in your twenties isn't unusual. Genetics plays a major role in when your hair starts turning grey, but research also links premature greying to factors such as vitamin B12 and iron deficiency, smoking and stress. Some of these factors are beyond your control, while others may be worth checking. Understanding what causes early greying, which blood tests might help and whether it can be slowed down is a good place to start.

How common is hair greying in your twenties?

More common than it feels when you are staring at the mirror. In a community study of 384 young adults aged 15 to 30 in Uttarakhand, 27.3% had premature greying. A survey of 6,390 young men in Korea, all under 30, found grey hair in 25.3% of them. So if you have a few white strands at 22 or 25, you are in the company of roughly one in four people your age in those surveys. The Bengaluru study below looked at greying before 25. The age cut-off used for premature greying varies between studies.

Why does hair turn white at all?

Each hair grows from a tiny pocket in the scalp called a follicle. Inside it sit pigment cells called melanocytes. They make melanin, the natural colour that gives your hair its black or brown shade. They pass it into the growing hair. When those pigment cells slow down or run out, the new hair grows without colour. It looks white or grey against the dark hair around it. The hair itself is not weaker. It simply has no pigment. What decides when those cells slow down is a mix of genes, nutrition, hormones, oxidative stress (wear and tear on cells from smoking, pollution and normal living) and possibly mental stress. The rest of this article goes through each one.

Is it mostly in your genes?

If you've started noticing white hair at a young age, your family history may offer a clue. Genetics plays a major role in when your hair begins to turn grey. In a Korean study, young men with a family history of premature greying had nearly 13 times higher odds of developing grey hair themselves. Family history was also linked to more severe greying. A study from Uttarakhand found a similar connection, with early greying in either parent increasing the likelihood of premature greying in their children. So, if your father started getting grey hair at 28, finding a few white strands at 24 may simply be part of your genetic makeup. You can't change the genes you've inherited, but knowing that family history may be responsible can help you avoid spending money on products that promise to reverse grey hair without good evidence.

Can low vitamin B12 or iron cause white hair?

Low vitamin B12 and iron levels have also been linked to early greying, making them worth checking if you're noticing white hair at a young age. A study from a Bengaluru hair clinic compared 37 people under 25 with premature greying against 37 without it. Those with grey hair had lower vitamin B12 and ferritin levels (a measure of stored iron). They also had lower HDL, or good cholesterol, and were more likely to have irregular eating habits and spend much of the day sitting. Another study from Jammu involving 240 people found lower calcium, vitamin B12 and ferritin levels in those with premature greying. A review by researchers at PGIMER Chandigarh also linked early greying with low vitamin B12, folate, calcium and ferritin.

However, these studies show a connection, not proof that nutrient deficiencies cause grey hair. The findings are particularly relevant if you eat little or no animal food. According to the NHS, people following a vegan diet without B12 supplements or fortified foods may develop a deficiency. Signs can include extreme tiredness, pins and needles, a sore tongue and mouth ulcers. Heavy periods can also reduce your body's iron stores.

If you want to understand those two in more detail, you can read these articles on vitamin B12 deficiency symptoms and iron deficiency in women.

Which blood tests should you ask for?

You don't need to get every blood test available just because you've noticed a few grey hairs. Based on the research discussed above, your doctor may consider checking:

• Serum ferritin: To see how much iron your body has stored.

• Vitamin B12 and folate: To check for deficiencies in these important vitamins.

• Calcium: If there's a reason to suspect low calcium levels.

• Lipid profile: To check cholesterol levels, including HDL (good cholesterol), which was lower in some studies.

• Thyroid function: To check for thyroid problems that may be linked to early greying.

Not everyone needs all these tests. Your doctor can decide which ones are useful based on your symptoms, diet and medical history. If a deficiency is found, treatment may involve dietary changes, supplements or, in some cases, injections. Don't start taking high-dose iron or other supplements without medical advice. The right treatment depends on what your body actually needs.

Does stress really turn hair white?

Your mother may be partly right. In the Jammu study, people who were greying reported higher stress scores than those who were not. Further evidence comes from a 2021 study in eLife by researchers at Columbia University. They measured colour along single hairs, almost like reading a timeline. They found white hairs that had naturally regained their colour. In one person, a hair lost its pigment during a stressful period and then regained it when the stress eased. This was a small study. It does not mean every grey hair will turn dark once you take a holiday. What it suggests is that some greying, near the threshold, may be more flexible than we once thought. Sleep, regular meals and some breathing room in your week are worth protecting for many reasons. Your hair may be one more.

The habits that make a difference

Smoking

Smoking is one of the most consistent links. The PGIMER meta-analysis named it among the main risk factors. In the Korean survey, men with more than five pack years of smoking (for example, one pack a day for five years) had 1.61 times higher odds of early greying. The Uttarakhand study found the same link in Indian youth. If you smoke, quitting is worth it for many reasons.

Weight and movement

Obesity was linked with early greying in Korea (about 2.6 times the odds, with more severe greying in the adjusted analysis) and body mass index was a predictor in Uttarakhand. Both Indian clinic studies found more greying in people who led a sedentary life. A daily walk and fewer hours glued to a chair help your heart and metabolism first. Your hair may follow.

Regular, balanced meals

The Bengaluru group with early greying ate more irregularly. Aim for meals built around foods rich in the nutrients that came up again and again:

• Vitamin B12: milk, curd, paneer, eggs, fish and chicken. Vegans may need fortified foods or a supplement, as the NHS notes

• Iron: dal, rajma, chana, green leafy vegetables, eggs and meat. Eat them with a source of vitamin C such as lemon or amla to help absorption

• Folate: green leafy vegetables, chickpeas and sprouts

• Calcium: milk, curd, paneer, ragi and sesame

If your meals are rushed and repetitive, our article on whether you should take a multivitamin explains who tends to benefit from help with small gaps.

Hair oiling

Here is one for your aunt. In the Jammu study, regular hair oiling seemed to be linked with less premature greying. One study cannot prove that oil keeps hair dark. Still, a gentle champi is easy to keep up and many people find it soothing. If you are also dealing with dry, snapping ends, these tips to prevent hair breakage will help.

Can white hair turn black again?

White hair can sometimes regain its natural colour, but it depends on what caused the greying. A review by researchers at PGIMER Chandigarh found that some cases of premature greying improved after related health problems were treated. An eLife study also found that a small number of grey hairs regained their pigment naturally. However, there's no reliable evidence that inherited greying can be reversed. Be careful with products that promise to turn white hair black within weeks. These claims aren't supported by strong scientific evidence.

If you prefer to cover your grey hair, hair dye is an option. Just remember to follow the instructions and do a patch test before every use, as some dyes can cause allergic reactions. And what about plucking white hairs? It won't bring their natural colour back. You're only removing the strand, not changing how the hair grows from the follicle.

When should you see a doctor?

See a doctor if you are worried, if your hair is turning white quickly or if you have other symptoms. The NHS advises seeing a GP if you think you may have a vitamin B12 or folate deficiency, with symptoms such as extreme tiredness or pins and needles. White patches on your skin can be vitiligo, which a GP can diagnose by examining the skin. The PGIMER review also noted that premature greying is an important marker of coronary artery disease, more so in smokers. So it is a sensible prompt to ask your doctor whether a heart health check makes sense for you, even if you feel well.

Finding your first white hair in your twenties can feel worrying, but it doesn't always mean something is wrong. For many people, it's simply genetics. If your parents started greying early, you might follow a similar pattern. Still, it's worth paying attention to your health. If you're noticing more white hair than expected, speak to your doctor about whether any nutritional deficiencies need checking. Eating well, getting enough sleep and avoiding smoking are good habits for your overall health, even if they don't bring back your natural hair colour. And when it comes to those white strands, whether you choose to colour them or leave them as they are is entirely up to you. A few grey hairs don't have to change how you feel about yourself.

Sources

• Premature graying of hair: risk factors, co-morbid conditions, pharmacotherapy and reversal. A systematic review and meta-analysis (Dermatologic Therapy, 2020)

• Factors associated with premature hair graying in a young Indian population (International Journal of Trichology, 2016)

• Association of epidemiological and biochemical factors with premature graying of hair: a case control study (International Journal of Trichology, 2018)

• Prevalence and correlates of premature graying of hair among young adults in Srinagar, Uttarakhand (International Journal of Trichology, 2020)

• Association of premature hair graying with family history, smoking and obesity (Journal of the American Academy of Dermatology, 2015)

• Quantitative mapping of human hair greying and reversal in relation to life stress (eLife, 2021)

• Vitamin B12 or folate deficiency anaemia (NHS)

Medical Disclaimer: This article is for general information and is not a substitute for advice from your doctor. Speak to a qualified healthcare professional before starting any supplement, especially if you are pregnant, breastfeeding or taking medication.