Iron insufficiency – distinctive symptoms, long-term repercussions, and nutritional guidelines for replenishing bodily iron reserves
Tomasz Jankowski
2026-03-22
3 min. read
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Iron represents an indispensable trace element that plays a pivotal role in the systemic distribution of oxygen within the human body. Its highest concentrations are observed within hemoglobin—the oxygen-binding protein in red blood cells—as well as in myoglobin, which stores oxygen in muscle tissue. Additionally, iron constitutes a critical component of enzymes that facilitate cellular respiration processes and detoxify reactive oxygen species, including harmful hydrogen peroxide. The remaining reserves of this micronutrient are deposited in organs such as the liver, spleen, and kidneys, as well as in blood plasma and bone marrow, from which they can be released in response to elevated physiological demand.
Iron deficiency is a symptom
Iron deficiency occurs most frequently during postpartum, menstrual, after prolonged exertion, recovery, as well as during puberty and old age. Inadequate lifestyle, stress, restrictive and unbalanced diets can affect low intake and absorption of iron.
The effects of iron deficiency
While there is a lack of iron in the body, overall physical and mental fitness decreases, the body is more prone to infections or heart rhythm disorders. However, the most dangerous effect caused by a deficiency of this microelement is anemia. This disease is primarily manifested by weakness, pale skin, drowsiness, dizziness. At a more advanced stage, inflammation of the mucous membrane and corners of the mouth, dryness and pelvic fatigue, hair and nail fractures.
How can you make up for the iron deficiency?
It is also worth considering supplementing with iron, especially during pregnancy, breastfeeding, and periods of heavy menstruation.
Iron deficiency in the diet
The first is found in animal products, i.e. liver, heart, kidneys, meat, meat processing with blood, poultry and fish. The second is in egg yolks, whole grains, green vegetables (including spinach, pepper, parsley), botany, turmeric, dried vegetables, and fruit.
