Can you use generic pineapple juice as a tenderizer?

While pineapple juice can be used as a meat tenderizer, it should not be used as a generic tenderizer. The enzyme bromelain, which is responsible for tenderizing meat, is only found in fresh pineapple or unsweetened pineapple juice. Generic pineapple juice, which is typically sweetened and made from concentrate, does not contain the bromelain necessary for tenderizing meat.