The three major types of monosaccharides that we ingest into our bodies that are part of the human diet are glucose, fructose and galactose. Now, when we ingest glucose and glucose makes its way to the side of plasma cells, our cells begin the glycolytic pathway and this breaks down that glucose into ATP molecules and Peruvian molecules and other molecules. But what happens when fructose or galactose actually make their wings the cytoplasm of our cells? So fructose we typically obtain from plants, and galactose we typically obtain from milk or dairy products. Now, it turns out that unlike glucose, which actually has its own catabolic pathway in our cells, these two sugars do not have their own individual breakdown pathways. And so when these two sugars monosaccharides actually make their way into the cells of our body, these sugars must be transformed into molecules, into metabolites that are part of that glycolytic pathway.