One year old babies can eat sugar, but it is not recommended that one year old babies eat refined sugar, such as white sugar, brown sugar, rock sugar which are extracted refined sugar. If you eat too much sugar, it is bad for your baby. First of all, it may cause tooth decay. In addition, too much sugar may affect the baby’s appetite, as well as eating habits. They may not feel the taste of other healthy foods, but lead to unbalanced diet. There is also a possibility of overweight. This is because too much sugar is converted into fat and stored in the body, which can lead to weight gain in babies. Eating sugar directly may lead to excessive fluctuations in the baby’s blood sugar, which is also bad for the baby’s health over time. That’s why refined sugar is not recommended for one-year-old babies. Food inside such as cereals contain starch, which can also be converted into sugar for energy when it enters the body.