To investigate whether the long term use of two dentifrices containing arginine , an insoluble calcium compound , and fluoride : ( 1 ) 1.5 % arginine and 1450 ppm F as sodium monofluorophosphate ( NaMFP ) in a dicalcium phosphate dihydrate ( dical ) base , and ( 2 ) 8.0 % arginine and 1450 ppm F as NaMFP in a calcium carbonate base , results in an increase in oral malodor potentially associated with increased ammonia production from breakdown of arginine , as compared to a commercially available fluoride dentifrice without arginine ( 1450 ppm F as NaMFP in a dical base ) , after 6 months of product use .