Hair falling out can be alarming. While it’s normal to lose around 50–100 strands a day, noticeable thinning or sudden shedding may point to underlying health issues. Understanding the possible causes can help you take action early and protect both your hair and overall well-being.

1. Nutrient Deficiencies

One of the most common reasons for hair loss is a lack of essential nutrients. Your hair follicles need vitamins and minerals like iron, zinc, vitamin D, and biotin to grow properly. When your body doesn’t get enough of these nutrients, it prioritizes vital organs over hair growth. This can lead to excessive shedding, brittle strands, or slow regrowth. People with restrictive diets or poor nutrition are especially at risk.