Originally Posted by kind2creatures
Sounds like it's similar to Aloe Vera.
Not quite. Aloe vera does not help with constipation for more that a day or two of use. It does contain anthraquinones, like senna, casgara sagrada, rhubarb root. So there is a laxative effect, which can cause dependency over time.
Nopal cactus contain pectin and lots of good fiber.