Here is an answer from the Genova website that does these types of stool analysis. In general an elevated level of this enzyme is more predictive of problems than diagnostic of anything in particular.
The following interventions may help to reduce beta-glucuronidase levels:
Probiotics (including Lactobacillus acidophilus,13 Lactobacillus GG,14 and
High-fiber diet (including both soluble and insoluble fiber)16,17,18
Fructooligosaccharides (FOS). FOS may act as a substrate for bifidobacteria.
Combining FOS with cellulose may be even more effective.19
Low- or non-meat diet.20 Lacto-vegetarian diets are associated with reduced levels
Lowering colonic pH. Raising fecal pH from 5 to 8 in vitro induces 11.5-fold rises in
Calcium-D-glucarate inhibits the enzyme.23,24 Foods with the highest concentration of
calcium-D-glucarate include oranges, apples, grapefruit, and cruciferous vegetables.25
Silymarin (milk thistle)27
Cumin or black pepper (avoid cayenne, which can increase levels of the enzyme)28