The stuff in a tube can give diahrrea. Maybe if you fed less of it along with thorough brushings. Your best tool is called a shedding comb. It is a metal comb with alternating long and short teeth. I use it on the cats I groom professionally and the owners actually think I thin the coat with shears (which I do not). An alternative that a lot of long haired cat owners take is to shave the cat during the shedding season or to just shave the undercarrage. You don't really notice it being shaved then except when they lay on their back.