Hi :) While I don't have experience taking HumaCleanse, I looked on their website and found this... I thought it might be useful for you.
"WHAT IS IN HUMACLEANSE? HUMACLEANSE contains 10g psyllium, 10mg senna, and 10mg cascara sagrada in each daily dose. The added natural laxatives keep things flowing smoothly by helping the body rid itself of toxins and waste. Cascara sagrada stimulates the long muscles along the colon to work in a wave like action. This action helps to loosen the build up so that the psyllium can then trap and remove it entirely."