By Dr Chung Wan Ling | IYAC Aesthetic Clinic

For many, the appearance of grey hair is an unwelcome reminder of ageing. It can feel sudden, surprising, or even unfair—especially when it shows up in your 20s or 30s. The question patients often ask is: “Can we reverse it?”

The short answer: Not always—but sometimes, yes.
Let’s explore the science behind grey hair, how nutrition and lifestyle play a role, and what you can do beyond reaching for the dye bottle.

---

Why Does Hair Turn Grey?

Hair gets its colour from melanin, a pigment produced by specialised cells called melanocytes located in hair follicles. With each hair growth cycle, melanocytes produce melanin, which is then incorporated into the keratin (the protein that makes up hair), giving it its natural shade.

As we age, melanocytes gradually reduce their melanin output. Over time, they can stop producing pigment altogether, resulting in strands of grey, silver, or white hair.

Several factors influence this process:

• Chronological age : Most people will begin to see some greying by their 40s or 50s.
• Genetics: If your parents or grandparents turned grey early, there’s a higher chance you will too.
• Oxidative stress: An accumulation of free radicals over time can damage melanocytes.
• Environmental triggers: Smoking, pollution, and chronic stress may accelerate greying.

   

---

Is Grey Hair Always Permanent?

Traditionally, grey hair was considered irreversible. But new research has challenged that idea—at least in some cases.

A 2021 study¹ found that under certain conditions, some greying can reverse temporarily. This appeared to occur when individuals experienced reduced psychological stress.

That said, spontaneous reversal is still uncommon—and tends to be short-lived. Once the follicle’s pigment-producing cells are depleted, regaining colour naturally becomes unlikely.

---

Could Nutrient Deficiencies Be a Factor?

Yes—nutritional status can influence hair pigmentation, particularly in premature greying (before age 30 in Asians, before 20 in Caucasians).

While genetics still play the dominant role, some nutrient deficiencies are worth highlighting:

🔹 Vitamin D

Vitamin D helps regulate melanocytes, the cells that produce hair pigment, and deficiency may reduce melanin production, contributing to the appearance of early white strands. While supplementation or safe sun exposure may not reverse existing white hair, it can support follicle health and potentially slow further greying.

🔹 Vitamin B12

Low B12 can impair DNA synthesis and affect melanin production in hair follicles. B12 deficiency is more common in vegetarians, older adults, or those with digestive conditions like gastritis or low stomach acid.

🔹 Iron

Iron supports healthy hair growth and is involved in oxygen transport to the follicle. While more commonly associated with hair shedding, low iron may also contribute to loss of colour in some individuals.

🔹 Copper

Copper is essential for melanin synthesis. Its role in pigmentation has been demonstrated in animal models, though deficiency in humans is rare.

🔹 Zinc

Zinc contributes to cellular repair and has antioxidant properties. Deficiency can affect both hair growth and colour.

🔹 Antioxidants (Vitamin C, E, Selenium)

These antioxidants help counteract oxidative stress in the follicle environment, supporting the overall function of pigment cells. It’s important to note that correcting a deficiency does not guarantee reversal of greying, but it may help slow progression and support scalp and hair health.

---

What Can You Do—Short of Dyeing Your Hair?

While colouring remains the most immediate and visible solution, there are gentler strategies for those seeking more holistic options.

✅ Scalp Care + Topical Support
At IYAC, we offer non-invasive scalp therapies that support healthy hair follicles and long-term hair vitality. One of our signature protocols is hair cpr —a multi-technology treatment that combines painless microneedling with targeted growth factors, iontophoresis, and acoustic shockwave therapy. While Hair CPR is not designed to reverse greying, it enhances scalp circulation, improves nutrient delivery, and supports follicle resilience. By optimising the scalp environment, this treatment may help preserve pigment in existing strands for longer and delay the progression of visible greying.

✅ Test and Optimise
If you’re experiencing premature greying, it’s worth checking your levels of B12, iron, zinc, and vitamin D through a basic blood test. At IYAC, we offer a Wellness Nutrition Screen to assess nutrient status and guide supplementation where appropriate.

✅ Support Hair from the Inside
A balanced diet with sufficient protein, leafy greens, seeds, nuts, and healthy fats provides the building blocks for healthy hair and scalp. Supplementing with high-quality multivitamins or hair-specific formulas may be recommended, especially when diet alone falls short.

✅ Manage Stress
Chronic stress not only affects hormone levels and sleep—it can accelerate oxidative stress in hair follicles. Practices like meditation, regular exercise, journaling, or nature exposure can help regulate cortisol and support overall well-being.

---

A Gentle Perspective on Greying

The desire to reverse grey hair is understandable—but it’s also helpful to approach it with realistic expectations. Genetics and biology still drive most of the process. While you can’t turn back the clock completely, you can slow it down, support your system, and feel more in control.

And remember: grey hair isn’t just a sign of ageing—it’s a sign of experience. In many cultures, silver strands are seen as symbols of wisdom, maturity, and resilience.

If you’re concerned about premature greying or hair health in general,  have a chat with us at IYAC. There may be more going on beneath the surface—and early intervention is always best.

 

 

References

1. Rosenberg, A., O’Connor, M., Wang, Y., Hermanson, D., & Picard, M. (2021). Quantitative mapping of human hair greying and reversal in relation to life stress. eLife, 10, e67437. https://doi.org/10.7554/eLife.67437
2. Trueb, R. M. (2009). Oxidative stress in ageing of hair. International Journal of Trichology, 1(1), 6–14.
3. Daulatabad, D., Tripathi, T., & Singal, A. (2016). A study of serum iron, serum ferritin, and serum calcium levels in premature canities. International Journal of Trichology, 8(3), 117–120.
4. Kumar, D., Saini, R., & Maheshwari, V. (2008). Reversible premature hair graying: A rare presentation of vitamin B12 deficiency. Indian Journal of Dermatology, 53(1), 33–34.
5. Bhat, R. M., Sharma, R., Pinto, A. C., Dandekeri, S., & Martis, J. (2013). Epidemiological and investigative study of premature graying of hair in higher secondary and pre-university school children. International Journal of Trichology, 5(1), 17–21.