@turkay1-- Yes, I've tried several different kinds. They all helped with my digestion after several weeks of use. However, all but the last one caused side effects that made me quit taking them.
It definitely takes several weeks for the supplements to start taking effect. So don't expect a result immediately. The issue I had with the first two diastase supplements I took was that it was giving me flatulence and after several weeks, it seemed to increase my acidity instead of reducing it.
I should note that all of these supplements had additional enzymes and ingredients in them aside from diastase like papain, protease and amylase. So I'm not sure which enzyme was giving me the side effects.
The diastase supplement I'm taking now also has a few other enzymes in it but it's been working great. It's an all natural one made from organic food sources. My digestion has definitely improved with this one.