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.
1. Children Flying Alone. How young is too young for kids to fly on their own? Only you, the parent, knows the answer to that but a lot depends on your child's maturity level, independence and simple common sense. If you ask the airlines, many say 5-year-olds are okay to travel solo and that includes American Airlines.