In FA GI pharma, it's mentioned that In hepatic encephalopathy, lactulose is useful because when lactulose is given it is acted upon by gut flora converting it into lactic acid and lactic acid in turn promotes nitrogen excretion as ammonium. But, In wikipedia and other resources it is mentioned that lactulose converts ammoina ( absorbable and toxic form) to ammonium ( not absorbable through gut and is non-toxic) and increase transit of bowel content through gut. I am confused. which of the mechanism of action is correct ? If both is correct, Can anybody pls help me to fill up what I am missing to combine them together and give a meaningful sense to both MOA mentioned above.Thanks.