Which Vitamin Deficiency Causes Hair Loss?

• 19 February 2025
• Dr Joseph Rizk

Last updated on March 12, 2025

Hair loss is a common concern for many, affecting both men and women at various stages of life. While numerous factors can contribute to hair thinning, one often-overlooked cause is vitamin deficiency.

This blog explores how deficiencies in essential vitamins and minerals impact hair health, disrupting the hair growth cycle and leading to brittle hair or hair loss. Understanding which vitamin deficiency causes hair loss can help individuals take proactive steps towards maintaining healthy hair and promoting hair regrowth.

The Role of Vitamins in Hair Growth

Healthy hair growth relies on a consistent supply of vitamins and minerals to nourish hair follicles and sustain the natural hair growth cycle. These nutrients play a crucial role in producing keratin, improving scalp circulation and maintaining healthy hair follicles. When deficiencies occur, they can contribute to hair loss, making it vital to recognise and address these gaps in your diet.

Key Vitamin Deficiencies and Their Impact on Hair Health

1. Vitamin D Deficiency

Vitamin D is essential for creating new hair follicles and supporting healthy hair growth. A lack of this vitamin can weaken hair follicles, leading to hair thinning or even conditions like alopecia areata. Spending time outdoors and consuming fortified foods can help combat Vitamin D deficiency and improve hair health.

2. Vitamin B12 Deficiency

Vitamin B12 helps carry oxygen and nutrients to the scalp and hair follicles. Without sufficient Vitamin B12, hair follicles can weaken, resulting in slower growth and hair thinning. This deficiency is especially common in those following a vegetarian or vegan diet.

3. Iron Deficiency

Iron is crucial for producing haemoglobin, which carries oxygen to tissues, including hair follicles. Iron deficiency is a leading cause of female pattern hair loss and can significantly impact hair growth. Consuming iron-rich foods or taking iron supplements under medical supervision can promote healthy hair growth.

4. Folic Acid (Vitamin B9) Deficiency

Folic acid supports cell growth, including the cells in hair follicles. A deficiency can hinder the hair growth cycle, leading to thinning hair and reduced hair regrowth. Incorporating leafy greens, legumes and fortified cereals into your diet can help address this deficiency.

5. Vitamin E Deficiency

Vitamin E is a powerful antioxidant that promotes scalp circulation and protects hair follicles from oxidative stress. Insufficient Vitamin E levels can result in brittle hair and hair loss. Nuts, seeds and vegetable oils are excellent sources of this vitamin.

Supporting Hair Growth Through Diet

A balanced diet rich in vitamins and minerals is crucial for promoting hair growth and maintaining healthy hair follicles. Incorporate foods high in Vitamin D, Vitamin B12, folic acid, Vitamin E and iron to nourish your scalp and support healthy hair growth. Supplements can also play a role in addressing specific deficiencies, but they should only be taken under medical advice.

Knowing which vitamin deficiency causes hair loss can provide insights into addressing hair thinning through dietary changes.

Treating Hair Loss Effectively

Addressing the root cause of hair loss is vital for long-term success. For those whose deficiency causes hair loss, improving their intake of essential nutrients is often the first step. Iron supplements, Vitamin D-rich foods and antioxidant-rich diets can help restore balance and improve hair health. Alongside dietary changes, professional treatments may offer additional support for promoting hair growth and treating hair loss effectively.

Conclusion

Vitamins and minerals are vital for maintaining healthy hair and deficiencies can significantly contribute to hair loss. Recognising the signs of vitamin deficiency, such as brittle hair or hair thinning and addressing them through a balanced diet or supplements can promote healthy hair growth. If you’re experiencing persistent hair loss, the team at White Hill Clinic can provide expert guidance and personalised solutions to restore your hair health.

How to Book a Consultation

To book a FREE consultation you can call us directly at 1300 512 345 or fill out our online form to schedule your appointment. If you have any questions or would like more information, you can also reach out to us via our contact page. We’re here to assist you and guide you through every step of the process.

FAQs

Can a vitamin deficiency cause permanent hair loss?

Vitamin deficiencies typically cause temporary hair loss if addressed promptly. Prolonged deficiencies, however, can weaken hair follicles and, in rare cases, contribute to more permanent damage. Early diagnosis and treatment are essential to restore healthy hair growth.

Are there specific vitamins that help with brittle hair?

Yes, vitamins like Vitamin E and biotin (Vitamin B7) are known to strengthen hair and reduce brittleness. A diet rich in antioxidants and essential nutrients supports hair shaft integrity and promotes overall hair health.

Can taking iron supplements regrow hair lost due to iron deficiency?

Iron supplements can improve hair regrowth if iron deficiency was the primary cause of hair loss. It’s essential to take them under medical supervision to avoid complications and achieve optimal results.

How can I tell if my hair loss is related to a vitamin deficiency?

Signs like brittle hair, excessive shedding, thinning hair and slow hair regrowth can indicate a vitamin deficiency. A healthcare professional can confirm this through blood tests and recommend an appropriate treatment plan.

About The Author

Dr Joseph Rizk

Dr Joseph Rizk is a trusted advanced Plastic Surgeon based in Sydney. He has undergone significant training to become an expert in the fields of breast, face and body surgery. Dr Rizk’s philosophy is that in Plastic Surgery, every patient requires a uniquely tailored solution to their presenting medical issue. The aim is to improve the quality of life of the patient, and finding this in the consultation is the most crucial aspect of being a Plastic Surgeon.