fCAT: innovative peace leadership: Wellness Tip: Avoid Sugar to be Sweet! Because "Sugar can make you feel angry Just as fibre can calm you by stabilising your blood sugar, consuming too much sugar can cause fluctuations in your blood sugar and have the opposite effect. Although you might crave sugar and experience an initial mood boost when you first have it, over time it will lead to mood swings and make you feel angry. Researchers at Princeton University found that these mood swings are amplified by the fact that sugar can be as addictive as some drugs. They found that the body can become dependent on sugar if enough is consumed, which leads to mood altering cravings. And when you finally give in and have a sugary snack? The whole cycle starts over again, and your mood swings worsen." - 5 surprising foods that can affect your mood