Unlike sugar, xylitol causes little change in blood sugar and insulin levels. Therefore, xylitol does not sabotage mood or energy levels. If a meal high in sugar (sucrose) is consumed, blood sugar can spike, causing the pancreas to secrete insulin, which consequently causes blood sugar levels to drop. If blood sugar levels drop too rapidly, the body secretes adrenaline in an attempt to bring blood sugar levels back up again. When this occurs, mood and energy levels can rise and fall, which results in more cravings and may lead to the consumption of even more sugar. This downward spiral keeps the body in a constant state of disarray and can lead to fatigue, weight gain, depression, and an unhealthy immune and digestive system.