The major functional and structural componentiron ferrous gluconate side effects of all the cells of the body, protein, is needed for all enzymes, membrane carriers, blood transport molecules, the intracellular matrices, hair, fingernails, serum albumin, keratin and collagen – as well as many hormones and a large part of cell membranes. Furthermore, the amino acids which serve as the building blocks of protein function as precursors for many coenzymes, hormones, nucleic acids, vitamins and oiron ii acetate synthesisther molecules essential for life.