The Truth About Hair Supplements – What Works?
Eurídice Castañeda Senior Manager of Translational Science
Let’s face it: the pressure for thicker, healthier hair can feel overwhelming. Every new product comes a new promise of bounce, shine and vitality. And with so many options available – from hair vitamins for hair growth to specialised hair growth supplements – how do you separate fact from fiction?
At Aurelia, we believe in beauty rooted in truth and empowered by science. We'll cut through the noise and explore the best vitamins for hair growth, helping you make informed choices to unlock your hair’s full potential and nourish healthy hair from within.
Understanding Hair Growth and Loss:
Hair growth is a cycle¹, a bit like the seasons. Understanding this cycle is crucial to seeing how hair loss or thinning might occur. The hair growth cycle has four main phases²:
- Anagen (Growth Phase): The active growth phase, lasting anywhere from two to eight years. During this time, hair follicles are actively producing new hair¹.
- Catagen (Transition Phase): The transitional phase, lasting about two weeks¹. During this phase, hair growth slows down, and the hair follicle shrinks¹.
- Telogen (Resting Phase): The resting phase, lasting around three months. During this phase, new hair begins to develop at the base of the old hair follicle¹.
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Exogen (Shedding Phase): An extension of the telogen phase, when developing hair grows upward and pushes the old hair out – resulting in shedding¹.
It's normal to shed some hair daily, but excessive hair loss can signal a problem³. Common causes include genetics, hormones, stress, and nutrient deficiencies⁴. A lack of iron, zinc, biotin, or vitamin A can also impair hair growth⁵.
Hair supplements are most effective when addressing these underlying deficiencies⁶. If you're experiencing noticeable thinning, consult a healthcare professional to rule out medical conditions and identify any nutrient gaps. Hair growth tablets can offer support, but they're not a cure-all. Understanding the cycle and addressing root causes is key to achieving healthy hair.
The Key Vitamins and Minerals for Hair Health:
Certain vitamins and minerals play a vital role in maintaining healthy hair. Here's a closer look at essential vitamins for hair and health:
- Biotin: Often considered one of the best hair vitamins, biotin is crucial for keratin production⁷. That’s the protein that gives your hair its strength and shine.
- Vitamin A: Vitamin A and hair health are closely linked, but it's a delicate balance. It's essential for cell growth, but too much can cause hair loss⁸.
- Vitamin C: A powerful antioxidant, vitamin C protects hair follicles from damage and aids in collagen production, important for hair structure8 and a healthy, vibrant scalp.
- Vitamin D: Vitamin D creates the cells that develop into hair follicles, playing an essential role in the hair growth cycle⁹.
- Iron: Iron carries oxygen to your hair follicles for hair growth. If you're iron deficient, this may affect your hair health¹⁰.
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Zinc: Zinc is involved in hair tissue growth and repair, making it an important nutrient for healthy hair¹¹.
Other important nutrients include:
- Vitamin E: A powerful antioxidant that helps protect hair follicles from damage and prevent hair loss¹².
- Selenium: An essential trace mineral that supports thyroid function – important for hair growth¹³.
- Omega-3 Fatty Acids: Healthy fats that nourish hair follicles and promote scalp health¹⁴.
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Protein: The building block of hair, essential for growth, strength, and repair. You’ll find it in meats, eggs, dairy, nuts and seeds.
While these nutrients are vital, remember that vitamins for hair growth are most effective when addressing specific deficiencies. A balanced diet and a holistic approach are key.

