Because you need more fat to reach and maintain a ketogenic state, reach for unsalted butter or moderate servings of regular margarine instead. You can use keto vegetables as a vehicle for fat by seasoning cooked vegetables with butter. "Ketogenic diets are often low in calcium, vitamin D, magnesium, and folic acid, which over time can lead to nutrient deficiencies if the diet is not planned carefully," adds Marie Spano, RD, a sports performance nutritionist in Atlanta. In fact, in addition to be metabolized in the glycolytic pathway, in anabolic conditions it can have other fates. This isomerization is a critical step for glycolytic pathway, as it prepares the molecule for the subsequent two steps. Finally, the isomerization of DHAP to a second molecule of glyceraldehyde-3- phosphate occurs. Thus, after the initial phosphorylation, no further energy is needed to keep the phosphorylated molecule within the cell, despite the large difference between its intra- and extracellular concentrations.