Refined sugar comes mostly from cane, sugar beets, and corn which are heavily processed to isolate the sugar. Common refined sugars are white cane sugar, brown cane sugar and High Fructose Corn Syrup.u003cbr/u003eu003cbr/u003e Refined sugars are different from natural sugars found in whole fruit and vegetables because they provide little to no nutritional value. When consumed, refined sugars spike blood sugar due to how quickly the body digests and absorbs it.