Does caffeine actually hurt cognition over long-term use?

Well i wouldnt say that its true =/ my mom gave me caffeine at about 2-3years old and ever since ive drank it now and then until i got to the age of 8-10 i began to drink it every morning, at dinner and even before bed.. now i cant say that its not true because ill be 16 this month yet i can remember quite a lot of things i WANT to remember. Even somethings at the age 4-5 i can remember slapping my teacher, i remember telling my mom about the time i used to live in the house down the road sitting in my room with my rocking horse having called my step father by his real name, even she wanted to know how i knew . . . to me i think it can help because it wakes you up and if your willing to learn and willing to do anything it dont matter what "researchers" say