i think sugar is one case of damaging teeth. Even smoking, drinking tea or coffee often can spoil teeth. Prolong illness can also spoil them. Diseases like typhoid can also change the color.
Sugar definitely spoils the teeth but, intake of sugar is must for the body as sugar gives us energy. So, limited intake of sugar is always recommended. To keep your teeth in good health brush them twice daily.
To much of anything is not good and the same rule applies to sugar also. We should be careful about its intake or else it will effect our health adversely...!
