Hair loss is often dismissed as a cosmetic concern, but dermatologists say it can sometimes signal deeper health problems such as nutritional deficiencies, hormonal imbalances or autoimmune conditions.
According to dermatologist Jushya Bhatia Sarin, certain blood tests can help identify the underlying causes when patients report persistent or unexplained hair thinning. In a recent Instagram post, she explained that these laboratory tests provide valuable insights into a person’s nutritional status, hormone levels and potential medical conditions affecting hair growth.
1. Serum Ferritin (Iron Stores)
One of the most important tests is serum ferritin, which measures the body’s iron reserves.
Dr Sarin notes that low ferritin levels are a common cause of long-term hair shedding among Indians. Iron deficiency can disrupt the hair growth cycle, causing hair follicles to prematurely enter the shedding phase.
2. Vitamin B12 Test
Another key test checks vitamin B12 levels.
According to Dr Sarin, a deficiency in this vitamin can lead to diffuse hair thinning across the scalp. Low B12 levels may also cause skin pigmentation changes and premature greying of hair, making it an important marker to evaluate in patients experiencing hair loss.
3. DHEAS Hormone Test
The dermatologist may also check DHEAS (Dehydroepiandrosterone Sulfate) levels, a hormone linked to androgen production.
Higher levels of this hormone in women can indicate an excess of male hormones, which may worsen acne and lead to hair thinning.
4. ANA (Anti-Nuclear Antibody) Test
When hair loss remains unexplained, doctors may recommend an ANA test to screen for autoimmune disorders.
Autoimmune diseases occur when the body’s immune system mistakenly attacks its own tissues — including hair follicles — potentially causing hair loss and skin pigmentation changes.
5. Serum Cortisol Test
Stress is another major factor linked to hair thinning.
A serum cortisol test measures the level of cortisol, a hormone released during stress. Persistently high cortisol levels can disrupt the hair growth cycle and may also aggravate acne.
6. Serum Albumin (Protein Levels)
Nutrition also plays a significant role in hair health.
Doctors may check serum albumin, a protein found in blood that reflects overall protein intake and absorption. Low protein levels can lead to thin hair and weak nails, often indicating poor nutrition or absorption problems.
Not Every Patient Needs All Tests
Dr Sarin emphasises that not every patient requires the same set of tests. Instead, individuals experiencing persistent or severe hair loss should consult a qualified dermatologist who can evaluate symptoms and recommend appropriate investigations.
Disclaimer:
This article provides general health information only and is not a substitute for professional medical advice. Always consult a qualified healthcare professional for diagnosis or treatment.