We can chew grapefruit pulp (we don't often chew drinks like olive oil and grapefruit juice during the Liver Flush ), but our digestion can not digest cellulose pulp.
No matter what you take, you can not digest grapefruit pulp, or other cellulose from other fruits and vegetables ... that is what majority of people on those forums keep posting as some worms .... not understanding it is either cellulose or intestinal mucous, common for people suffering from dysbiosis.