Hair loss may indicate an underlying health problem, experts warn.
Losing a few hairs daily is normal. It’s common to shed up to 100 strands per day, especially when showering or brushing. However, excessive hair loss could signal an “internal disturbance,” says Anabel Kingsley, a consultant trichologist at Philip Kingsley.
Kingsley explains that hair is a “non-essential tissue,” meaning the body prioritizes other functions over hair maintenance. If there’s an issue elsewhere in the body, resources are diverted away from the hair, leading to potential hair loss.
Excessive hair shedding, known as ‘telogen effluvium,’ can stem from various causes, often linked to vitamin deficiencies. According to Kingsley, deficiencies in iron, vitamin B12, and vitamin D, along with thyroid disorders (both hypothyroidism and hyperthyroidism) and rapid weight loss, are common triggers.
Other factors contributing to hair loss include poor diet, stress, high fevers, surgeries requiring general anesthesia, certain medications, and changes in contraceptive use. Hair loss caused by illness or fever may resolve once the body recovers. However, ongoing issues like vitamin deficiencies or thyroid problems can lead to prolonged hair loss, says Dr. Sarah Brewer, a GP and medical nutritionist.
Dr. Brewer highlights that anemia can lead to hair loss. Anemia, characterized by low hemoglobin levels, means hair follicles may not get enough oxygen. Low iron levels also reduce ferritin, an iron-storage protein. Meat eaters are less likely to suffer from iron deficiency anemia compared to non-meat eaters, as meat is rich in iron. Consuming plant-based iron sources with vitamin C can enhance absorption.
Stress is another significant factor, as stress hormones constrict blood vessels, reducing oxygen and nutrient flow to hair follicles. Prolonged stress can shorten hair life cycles, leading to rapid thinning.
Identifying the cause of hair loss is crucial for effective treatment. Kingsley emphasizes the importance of thorough blood tests to diagnose and address both the underlying condition and the resulting hair loss. She advises consulting a trichologist if hair loss persists for more than three months or recurs.
