“…These advertisements claim that the chemical similarity between chlorophyll and the prosthetic group (heme) of hemoglobin may be responsible for protecting the human body from several diseases. Although chlorophyll and its derivatives were suggested to display hematopoietic activity in the 30s (Hughes & Latner, 1936;Patek, 1936), the later elucidation of the biosynthetic pathways of both chlorophyll and hemoglobin ruled out this hypothesis. The first steps of this biosynthesis are similar in plants, animals and fungi; however, they occur in different intracellular compartments and are catalyzed by enzymes that have the same specificities but differ in structure (amino acid sequence).…”