At the end of the Krebs cycle, the final product is oxaloacetic acid. This is identical to the oxaloacetic acid that begins the cycle. Now the molecule is ready to accept another acetyl-CoA molecule to begin another turn of the cycle. All told, the Krebs cycle forms (per two molecules of pyruvic acid) two ATP molecules, ten NADH molecules, and two FADH2 molecules.
If you take Regular insulin or a longer-acting insulin, you should generally take it 15 to 30 minutes before a meal. If you take insulin lispro (brand name: Humalog), which works very quickly, you should generally take it less than 15 minutes before you eat.
Eventually, your pancreas simply can't make enough insulin to keep up with your body's needs and all the non-insulin diabetes therapies in the world won't be sufficient to keep your blood glucose levels in check. When that happens, insulin injections become a necessity. Your blood glucose before the meal. The higher the reading the more insulin you will need in order to bring your blood glucose level down (this is called a correction factor). * Your blood glucose levels the past few days after that meal.