A good Candida treatment usually includes a detox or cleanse period before the diet is started. But if you're on a good Candida diet which includes lots of green vegetables and an absolute minimum amount of animal fats and protein, then the diet itself will act as a type of cleanse for the body. For a diet to be able to do this, it should exclude all processed foods which contain chemicals since they would prevent the action of detoxing taking place.
I personally dislike the idea of ingesting Psyllium or using it as a detox substance. This is due to the fact that the husks of the Psyllium seeds are the portion of the Psyllium which is generally used to make a detox product. The husks are very tough and cannot be completely digested by the digestive system meaning that, even if the husks have been ground, tiny particles or shards of the husks remain in the intestines, and these have been known to cause tiny cuts or nicks in the walls of the intestinal walls. There are also possible side effects involved with ingesting Psyllium, some of the milder effects are bloating and gas, but other possible effects are constipation, stomach pain, vomiting, and rectal bleeding. Sodium-bentonite powder would make a safer choice to use during a detox. Fresh lemon juice mixed with water also makes an excellent detox drink.