Medical blog
Ferritin is one of the most frequently analyzed values when we talk about hair loss. And, at the same time, one of the most frequently interpreted superficially.
In practice, it is not uncommon for test results to be considered "normal" while hair loss persists. This discrepancy raises an essential question: is it enough for ferritin to be within the reference range, or is there an optimal level needed for the correct functioning of the hair follicle?
To understand this, it is important to clarify what ferritin actually represents. It reflects the body's iron stores and plays an essential role in cell proliferation processes. The hair follicle is one of the most metabolically active tissues in the body, and hair growth depends on a constant supply of nutrients and energy.
When iron reserves are low, the body prioritizes vital functions. Hair is not a biological priority, so its growth cycle is among the first to be affected. The result is a premature shift of the hairs into the resting phase, a phenomenon known as telogen effluvium.
The problem lies in the way we interpret ferritin values. The reference ranges in laboratory reports are established statistically and indicate the limits within which most of the population falls. They do not always reflect the optimal level for specific functions, such as hair growth.
In many situations, ferritin values considered "normal" may be insufficient to support a healthy hair regeneration cycle. In dermatological practice and in studies dedicated to hair loss, it has frequently been observed that patients with telogen effluvium or diffuse alopecia have ferritin values in the lower part of the normal range.
Although there is no absolute consensus on a universal threshold, much of the data suggests that ferritin levels below 30 ng/mL are frequently associated with hair loss, and that supporting hair growth often requires a higher level, around values of 40–70 ng/mL, depending on the individual context.
This difference between "normal" and "optimal" is essential.
Another important aspect is that ferritin should not be interpreted in isolation. It is influenced by inflammation, nutritional status and various chronic conditions. In certain situations, an apparently normal ferritin level may in fact mask reduced iron availability at cellular level.
Furthermore, correcting the deficiency does not translate immediately into stopping hair loss. There is a physiological lag between the moment the imbalance appears and the moment the hair reacts. Similarly, replenishing iron stores takes time, and the effects on the growth cycle only become visible after several months.
For this reason, the approach must be a nuanced one. It is not only about "bringing the test results back to normal", but about understanding the patient's context and the specific needs of the body.
In medical practice, correcting the ferritin level may represent an essential step in managing hair loss, but it is rarely the only one. Stress, hormonal imbalances, diet or associated conditions may contribute in parallel and must be assessed together.
In the end, hair loss is not just a surface problem.
It is often the result of an internal imbalance that begins long before it becomes visible.
And sometimes, the answer lies not in the fact that the test results are "normal", but in the fact that they are not yet optimal.
Dr. Mihaela Marinescu
Specialist physician in Geriatrics and Gerontology,
International certification in Precision & Anti-Aging Medicine (A4M)
Our team of specialists is here to help you. Fill in the form below and we will contact you as soon as possible.
Last name
First name
Phone
Message (optional)
By pressing the "send" button, I agree to the processing of my personal data (which may also include medical data) for the purpose of the provision of services by the Maison Longévité clinic.
Article published by Maison Longévité Clinic. The information is educational and does not replace a medical consultation.
Medical content written and reviewed by Dr. Mihaela Marinescu — Specialist in Geriatrics and Gerontology · Medical Director, Maison Longévité. Last reviewed: 7 October 2026. Meet the medical team
This page is for information and education. It does not replace a medical consultation or the individual recommendations of a healthcare professional.
Book consultation
Fill in the form below and we will contact you to arrange the details of your appointment.
