A Trichologist explains hair thinning

Hair thinning and hair loss are more common than many of us realise and can be influenced by a range of factors, from genetics and hormonal changes to stress, nutrition and scalp health. In this expert-led article, Consultant Trichologist Shirley McDonald FIT of The Hair and Scalp Clinic, London, shares her professional insight into the most common causes of hair thinning in women and men, including telogen effluvium, lifestyle influences and the role of a healthy scalp. Drawing on her clinical experience, Shirley explains why identifying the root cause is essential and when hair regrowth may be possible.

Hair thinning has many causes, with genetic hair loss being the most well-known. As both women and men age, they often experience a gradual decrease in hair density. While hair loss manifests differently in men and women, the underlying causes remain consistent: age, genetics, and hormonal fluctuations. In women, it becomes noticeable as the centre part widens. In men, it typically begins with a receding hairline and/or crown loss.

Telogen effluvium, a common cause of hair thinning, occurs when many hair follicles enter the resting phase, increasing shedding. It’s often triggered by stressors like illness, surgery, weight loss, or childbirth, as well as emotional stress, medications, or deficiencies. While usually resolving in months, chronic cases can persist. Identifying and addressing the cause, such as stress management, nutritional balance, or medication adjustment, is key for regrowth.

Diet and lifestyle can significantly influence hair growth. Protein is essential, especially for vegetarians and vegans, to avoid deficiencies that impact hair growth. A balanced diet with vitamins and minerals like iron and zinc is crucial, as deficiencies can cause hair loss. Sudden weight loss and stress can also affect hair growth; managing stress through exercise and relaxation is beneficial.

A healthy scalp is crucial for optimal hair growth. An imbalanced scalp microbiome can lead to inflammation, dandruff, and hair thinning. Maintaining a balanced scalp through proper hygiene and targeted treatments is essential for healthy hair follicle function and development.

Hair thinning, while often a source of considerable distress, does offer the possibility of reversal, dependent largely on the underlying cause of the hair loss. Factors such as stress, poor diet, hormonal imbalances, and certain medical conditions can contribute to hair thinning. Identifying and treating these root causes is crucial for promoting hair regrowth. This may involve lifestyle changes, medical treatments, or a combination of both. With proper care and attention to the underlying issues, the chances of hair regrowth are significantly improved, leading to fuller and healthier hair over time. If you’re concerned about any type of hair loss then consult your GP or a hair and scalp specialist such as trichologist or dermatologist.

Article by Shirley McDonald FIT, Consultant Trichologist (The Hair and Scalp Clinic, London)