Even with a fast digesting protein such as whey, it can take hours for the leucine in whey to be liberated from the protein & enter circulation; therefore leucine concentrations in the plasma never spike to high levels.
Rating Newest Oldest. Best Answer: The absolute minimum age for flying alone on major airlines in 5 years old. Passengers who are ages 5-14 and are flying alone (without a companion who is at least 15 years of age) are considered Unaccompanied Minors (UM's). Passengers whose ages range from 15-17 are considered Young Adults and do not have to use the UM service, but can if they would like to.
The United States is an example. For American airlines, the US Federal Aviation Administration (FAA) imposes a minimum age of 21 years and 1,500 flight hours for commercial aircraft co-pilots. Applicants for an air/airline transport pilot certificate must be at least 23 years of age and undergo an additional forty hoursâ training.