Sodas or any sort of carbonated drinks are bad for ADHD as well as for the general health. Just like the candies mentioned above, sodas are filled with a high content of sugar that is bad for children as well as the adults. What makes sodas worse than candies is that it contains more than just sugar, it has fructose corn syrup and caffeine mixed in it too. Both these products are known to promote hyperactivity and distractibility in people. People often get too distracted and leave their work lying around after having a can of soda. Furthermore, based on a study done in 2013, kids aged 5 years or younger have shown signs of aggression and social withdrawal after regularly drinking carbonated drinks.