Practice Dr. Thomas Ackermann · Herzogenaurach

Iron deficiency: recognising, clarifying, treating

Iron deficiency is one of the most common nutrient deficiencies — and at the same time one of the most frequently misinterpreted. This page summarises what is medically established: how iron deficiency shows itself, how it is properly diagnosed and which treatment is appropriate when. Without promises, without one-size-fits-all solutions — and with the clear reminder that not every form of fatigue is an iron problem.

What iron does in the body

Iron is an essential trace element. It is a central component of haemoglobin — the red blood pigment that transports oxygen — and is involved in numerous metabolic processes. When iron is missing, oxygen transport and cellular energy supply are the first to suffer. Medically, a distinction is made between latent iron deficiency — iron stores are depleted but the blood count is still unremarkable — and iron deficiency anaemia, in which blood formation is already impaired.

Symptoms — and why they can mislead

Iron deficiency can manifest among other things through:

  • persistent fatigue and exhaustion
  • reduced concentration and performance
  • hair loss and brittle nails
  • pale skin and mucous membranes
  • shortness of breath or palpitations on exertion
  • cold sensitivity, occasionally restless legs

These complaints are all unspecific. They can equally stem from the thyroid, from hormonal balance, from sleep deficit or from psychological stress. That is why diagnostic clarification, not treatment, comes first — otherwise an iron deficiency is treated that is not one, and the actual cause is missed.

Causes and forms

The causes can be grouped into four categories: increased loss — in women, menstruation is the most common cause, along with bleeding in the gastrointestinal tract; increased need — for example during pregnancy, growth or with intensive sport; reduced intake — with one-sided, vegetarian or vegan diets; and impaired absorption — for example with chronic inflammatory bowel diseases, coeliac disease, after gastric surgery or under long-term use of acid blockers. Which cause is present co-determines how treatment is approached — and whether further clarification is needed.

Diagnostics: looking at the right values

The most important marker is ferritin — it reflects iron stores. In addition come the blood count (including haemoglobin and erythrocyte indices) and transferrin saturation. An important caveat: ferritin is an acute-phase protein and can be falsely elevated in inflammation — therefore the CRP value is determined alongside for proper interpretation. Blood is drawn in our practice; if current values are already available, you can submit them in advance.

Treatment: from tablet to infusion

For confirmed iron deficiency, oral intake of iron preparations is the standard. It is effective for many patients but can cause gastrointestinal complaints.

An iron infusion can be appropriate when oral preparations are not tolerated or are insufficient, in the case of absorption disorders, or when stores need to be replenished quickly.

Why iron infusion belongs in a medical setting. Intravenously administered iron can — rarely, but seriously — trigger severe hypersensitivity reactions. A Red Hand letter (Rote-Hand-Brief) therefore stipulates that each administration may only take place where such a reaction can be immediately managed: with emergency equipment, trained personnel and monitoring during and after the infusion. This emergency-medical environment is missing in many places — one reason why iron infusion is often not offered at all. In a practice led by an anaesthesiologist, it is part of everyday work.

Indication, procedure and safety of intravenous iron administration are described in detail on the page about iron substitution.

The path at our practice

Treatment never starts with the infusion, but with clarification:

  1. Initial consultation — on-site or via video consultation: history, symptoms, prior findings and the next steps.
  2. Laboratory values — if current values are available, please send them in advance; in the video consultation, documents and images can be uploaded directly, alternatively an email is sufficient.
  3. Blood draw at the practice — if no or no current values are available, followed by discussion of findings.
  4. Treatment plan — discussed together: whether treatment is necessary and, if so, which one.
  5. For intravenous administration — prescription and a separate infusion appointment with monitoring.

Frequently asked questions

Is fatigue always a sign of iron deficiency?

No. Fatigue is a very unspecific symptom and can have many causes — from the thyroid to hormonal balance to sleep and psychological stress. That is why clarification, not treatment, comes first.

Can I take iron preventively?

This is not advisable. Iron without a confirmed deficiency provides no benefit and is not harmless — the body cannot actively eliminate excess iron. Intake should be tied to a confirmed finding.

Tablets or infusion — what is better?

This cannot be answered in general terms. With confirmed deficiency, oral intake is the standard. Infusion is considered when tablets are not tolerated or are insufficient, in absorption disorders, or when stores need to be replenished quickly.

How quickly do symptoms improve?

This is individual. With oral therapy, it may take weeks to months for stores to refill; symptoms often improve earlier. Improvement can occur sooner with infusion treatment, but the exact course always depends on individual factors.

An initial consultation — on request as a video consultation — clarifies whether iron deficiency is present and which path suits you.

To iron substitution and appointment booking →

Medically endorsed by Dr. med. Thomas Ackermann, specialist — Private practice Harmony of Aesthetics, Herzogenaurach. This page provides information and does not replace individual medical consultation.