The following is a Kashrus alert issued by the Chicago Rabbinical Council (CRC). While most Mt. Dew products are acceptable as kosher even without a kosher certification on the label the Mt. Dew Kick Start Energy Drinks are an exception as they may contain added kosher sensitive ingredients such as white grape juice.
As such, only those cans of Mt. Dew Kick Start Energy Drinks that bear a reliable kosher certification on the actual can should be considered as certified kosher.