My other half and I use the whole psyllium husk instead of the powder.
Hubby, being recent British import, refers to it as "drinking BOI-led SAWdust" as a I serve him breakfast in bed, once he's up and about, then a yogurt fruit smoothie with protein powder, then beans on egg on cheese on toast and then elevenses.
BTW, he lasted 7 days on the MC, P&B shakes started on day 3 of Master-Cleanse and has continued for the last 3 weeks, 2/day and shoots for a 3rd. He's not into giving "POO REPORTS", but given by the number of times I made him go back into the office to light the incense, something is working.