Sugar is a Vanilla item derived from Sugar Cane. Sugar is a necessary component in crafting Cake. Neither Sugar nor Sugar Cane can be eaten by themselves. Besides crafting, Sugar is also used in brewing to craft a Potion of Speed. This may be because Sugar makes you hyper, so you would most likely run around faster and more often. In Tekkit, the only items that requires Sugar as an ingredient are the Body Stone and Coffee.