If you've been noticing more hair in your brush, your shower drain, or on your pillow, you're not alone. Hair shedding affects millions of people — and the frustrating part is that most people never figure out why it's happening.
The good news? Most causes of hair loss are manageable once you identify them. Here are the 7 most common reasons your hair is falling out — and what you can actually do about each one.
1. Nutritional Deficiencies (Especially Biotin)
Your hair is made almost entirely of a protein called keratin. To produce keratin, your body needs an adequate supply of biotin (Vitamin B7). When biotin is low, keratin production slows — and your hair pays the price. A targeted supplement delivering at least 2,500–6,000 mcg daily is often needed to see a real difference.
2. Chronic Stress
Stress pushes hair follicles into a resting phase called telogen effluvium. Hair stops growing and starts shedding in large amounts — often appearing 2–3 months after the stressful event, making it hard to connect the dots.
3. Hormonal Changes
Pregnancy, postpartum, menopause, and thyroid imbalances all affect hair growth. Estrogen levels influence the hair growth cycle — when they drop, shedding increases. This is why so many women experience dramatic hair loss after giving birth or during perimenopause.
4. Poor Diet
Hair needs protein, iron, zinc, and B vitamins to grow. A diet low in these nutrients starves your follicles. Even moderate deficiencies can cause noticeable thinning over time.
5. Over-Styling and Heat Damage
Frequent heat styling, tight hairstyles, and chemical treatments physically damage the hair shaft and weaken follicles. This is called traction alopecia and is entirely preventable.
6. Scalp Health Issues
An unhealthy scalp — dandruff, excess oil, or inflammation — creates a poor environment for hair growth. Healthy follicles need a clean, balanced scalp to thrive.
7. Genetics
Androgenetic alopecia is the most common cause of hair loss worldwide. While genetics play a role, supporting your hair with targeted nutrition can slow progression and maintain the hair you have.
What You Can Do Today
Nutrition is one area where you can make an immediate difference. A daily biotin supplement — especially one that includes antioxidant vitamins like A, C, and E — gives your follicles the raw materials they need. Most customers notice less shedding within 2–3 weeks, and visibly thicker hair by weeks 6–8.