Is your sweet tooth raging? It may be time to get it under control, for the sake of your health: Too much sugar a day can weaken your immune system, raise your risk of cancer and wreak havoc with your insulin levels. Doctors warn that too much sugar can drive up blood sugar, leading to insulin resistance, weight gain, and a host of other conditions you want to avoid, especially if you are worried about getting COVID. Research has shown that symptoms of COVID are worse among those with high blood sugar, diabetes, obesity, and metabolic syndrome, all tied to sugar intake.