Root Revive Guide exists to demystify hair growth. We translate the latest scientific research and practical experience into clear, actionable advice you can trust. Whether you are dealing with excessive shedding, looking to optimise your routine or simply curious about how hair grows, our aim is to equip you with well‑sourced information and easy‑to‑use tools.
Hair is more than just a cosmetic feature—it protects your scalp and can have a profound impact on self‑confidence. Our mission is to empower people with evidence‑based knowledge so they can make informed decisions about their hair health. We believe that transparency, scientific rigour and compassion should underpin every article, tool and resource we publish.
Human hair grows in a repeating cycle with four distinct stages: anagen, catagen, telogen and exogen. During the anagen phase follicles actively produce new hair fibres; this stage can last between two and seven years and roughly 85–90 % of scalp hairs are in this stage at any given time. The catagen phase is a brief transition lasting a few weeks; only around 5 % of hairs are undergoing this change. Next comes the telogen or resting phase, when growth pauses for three to six months and approximately 10–15 % of hairs are dormant. Finally, in the exogen phase older hairs are shed to make way for new growth—losing 50–100 hairs per day is a normal part of this process. Because each follicle operates independently, shedding occurs gradually rather than all at once.
Factors such as genetics, hormones, nutrient intake and stress can influence the length of each stage and the overall health of hair follicles. Understanding how these stages work helps you set realistic expectations and choose appropriate strategies to support growth.
Healthy hair starts from within. Protein makes up the bulk of each hair strand, so adequate dietary protein—from foods like eggs, nuts, beans and lean meat—is essential for optimal growth. Micronutrients such as zinc, biotin, iron and vitamins C, B and D support follicle health and oxygen transport. A varied diet rich in iron‑containing foods (e.g. fish, spinach, lentils and red meat) helps form haemoglobin, which carries oxygen throughout the body, including to the scalp.
Vitamin deficiencies can lead to shedding. Vitamins A, B2, B3, B7 (biotin), B9, B12, C, D and E, along with minerals iron, selenium and zinc, all play roles in new hair growth. However, excessive supplementation can be harmful; for example, too much vitamin A or iron may actually increase hair loss. When you suspect a deficiency, talk to your healthcare provider and rely on food first.
Stress management and gentle hair care also matter. Elevated cortisol levels during prolonged stress can push hairs into the telogen phase prematurely, leading to noticeable shedding. Practices such as meditation, yoga, adequate sleep and maintaining a balanced workload can help keep stress in check. Additionally, avoid tight hairstyles that put excessive tension on the hair shaft, as they can cause traction alopecia and breakage.
We follow a rigorous process to ensure our content is accurate, trustworthy and up to date:
The information on Root Revive Guide is intended for general educational purposes. We do not provide medical, diagnostic or treatment advice. Hair loss can result from various underlying causes—including hormonal imbalances, genetic predispositions and medical conditions—and may require consultation with a dermatologist or healthcare provider. Always seek qualified advice before making changes to your health regimen.
If you have questions about our content or wish to suggest a topic, please get in touch. We value reader feedback and continually strive to improve our resources.