There are more complex and confusing situations.

Analyzes indicate iron deficiency, but it is actually normal. For example, with low ferritin, which in itself is not always a sign of iron deficiency. It occurs when there is a shortage of either hemoglobin, which carries oxygen in the blood cells, or red blood cells, or both. Reduced ferritin may indicate the initial stage of anemia, and may not be related to it. So if you suspect iron deficiency, you need to take tests for hemoglobin and red blood cells, and not ferritin.