Bromelain comes from the pineapple fruit and stem.
The fact that it is absorbed (unchanged) in animal experiments at a 40 percent rate is significant.
Its benefits include having anti-inflammatory, antioxidant, anti-edema and anti-coagulation effects.
In some animal studies, bromelain was shown to inhibit the growth of tumors and malignant cells.
It also has skin debridement and fibrinolytic activity, and it inhibits platelet aggression.
Though it is possible to get bromelain from fresh pineapple juice, the dosage you need may not be met by the quantities you drink.
This is why it is useful to get it in supplement form.