Doctor, what really helps against iron deficiency?

Iron plays an important role in many biochemical processes in our body and is particularly important for oxygen transport. A lack of iron weakens, makes you tired, lacks concentration and manifests itself in many other often unspecific symptoms. Patients are depressed and exhausted, suffer from headaches, hair loss and dizziness and find it difficult to defend themselves against infections, because the immune system also needs iron very urgently. When we have blood somewhere in the body