• AbstractHealth indicators show a health-related characteristic that allows the study, evaluation and conclusion of a health process. Therefore, it allows us to influence public health policies to obtain an improvement in the health status of the population.Iron deficiency is one of the most prevalent forms of malnutrition, without quality of life and can present in anaemia, with reduce of hemoglobin (it causes 50% of anaemia around the world) and in ferropenia, iron deficiency, without anaemia. The iron deficiency has a very heavy rates of mortality associated of it.The iron element is a d-block transition element with an oxidation changeable ranging between -2 and 6+ which makes iron to be in different biological ways: ferrous (Fe 2+ ), ferric (Fe 3+ ), or ferryl (Fe. This capacity allows iron to bind to manifold ligands/proteins of the human organism, which are essential for all living cells; to participate in many metabolic and energetic pathways, like a production of energy in mitochondria, binding and transport of oxygen, regulation of cell growth and differentiation, synthesis and packaging of neurotransmitters and degradation of catecholamines [2], synthesis of the deoxyribonucleic acid or DNA [3] and others.As free iron is toxic to cells, it is stored complexed to protein as ferritin. Thus, the serum ferritin level correlates with a total body iron, could discard ferropenia (iron deficiency without anaemia) and establish he quality of life.Women, especially in their fertile stage, tend to have lower values because of menstrual losses, even during normal menses. In this small text we will try to reflect on how ferritin can be a parameter of evaluation of quality of life and normality of body functions.