Carbs, fats and proteins can all be used to produce glucose. Your body thrives on glucose, which is the sugar it uses to synthesize energy. Carbohydrates supply glucose and other sugars that are converted into glucose. But it's such a vital source of energy that the body has a back-up system called gluconeogenesis.
On its website, the U.S. Navy doesn't provide information about the average enlistment age. It notes that you can join from ages 17 through 34. The U.S. Air Force Personnel Center website doesn't provide an enlistment age average, but it does note that age 29 is the average age of its enlisted force, as of 2013.
Other opportunities for enlistment if you are 38 years old include the Navy Reserve, which has a maximum entrance age of 39 years; the Air Force National Guard, which has a maximum entrance age of 40 years; and the Coast Guard Reserve, which has a maximum entrance age of 39 years.ther opportunities for enlistment if you are 38 years old include the Navy Reserve, which has a maximum entrance age of 39 years; the Air Force National Guard, which has a maximum entrance age of 40 years; and the Coast Guard Reserve, which has a maximum entrance age of 39 years.