What is the function of ferritin in the body?

Ferritin serves a crucial role in the body primarily as an iron storage protein. It is responsible for sequestering excess iron that is not immediately needed for physiological processes, ensuring that iron is available in a soluble and non-toxic form. When the body requires iron, such as for the synthesis of hemoglobin in red blood cells, ferritin releases the stored iron for use. This function is vital for maintaining iron homeostasis and preventing deficiency or overload, as free iron can be toxic and lead to oxidative stress.

While oxygen transport involves hemoglobin, it is not a function of ferritin. Protein synthesis and enzyme activity, while essential bodily functions, do not pertain directly to the role of ferritin. Instead, ferritin's primary and most important role remains the storage of iron, which underscores its significance in metabolic and physiological processes related to iron management.