It is well established that consuming table sugar in large quantities causes negative effects on human health and on his immune system. In this study we intended to show the severity of COVID-19 among the patients who used to consume excessive quantities of sugar. We compared them with people satisfy with eating small or moderate amounts. The results revealed that the infection is always more severe among the individuals who intake large quantities of sugar, the percentage of those who are forced to intensive care units is higher, and the number of deaths is greater. These results were embodied among men and women.