While the following article is discussing systemic enzymes, perhaps it's worth considering, as he mentions that just because a label shows more milligrams of an ingredient doesn't always mean it's better:
/drwongsessentials.com/zymessence-compared/drwongsessentials.com/zymessence-letterAgain, this is regarding the Zymessence systemic enzyme formula. I've taken this with good results, but, obviously, not as a digestive enzyme.