Thyroid-related hair loss is a common concern that affects many individuals worldwide. On average, people shed up to 100 hairs daily from their scalp. However, for individuals with thyroid conditions, hair loss can be more pronounced, leading to noticeable hair thinning. This article explores the connection between hair loss and thyroid conditions, including the causes, symptoms, available treatments, and prevention methods.
What is Thyroid-Related Hair Loss and How Does it Happen?

Thyroid-related hair loss refers to the excessive shedding and thinning of hair due to disruptions in the production of thyroid hormones, such as triiodothyronine (T3) and thyroxine (T4). The thyroid gland regulates the body’s metabolism and energy levels. When the thyroid gland is underactive (hypothyroidism) or overactive (hyperthyroidism), it can affect the normal growth cycle of hair follicles, leading to hair loss.1
Thyroid-related hair loss can occur due to several reasons. In hypothyroidism, the decreased production of thyroid hormones slows down the hair growth cycle, resulting in thinning hair. Additionally, the hair may become dry, brittle, and prone to breakage. In hyperthyroidism, the accelerated metabolic rate can increase hair shedding and finer hair texture.
Read More: 8 Medications That May Cause Hypothyroidism