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.
Insulin lispro should be injected under the skin within 15 minutes before you eat. Your doctor will tell you how much insulin lispro to inject. Remember, you must eat 15 minutes after you take this insulin shot. Insulin lispro is a little easier to take than regular insulin. If you've been using regular insulin, you've had to inject the insulin and then wait 30 to 45 minutes before eating. Many people find it hard to time regular insulin injections and mealtimes. Sometimes they end up eating too early or too late. Then they don't get the best blood sugar control. Since insulin lispro is taken so close to meals, it may help you get the best possible blood sugar control.