I used The Ultimate colon cleanse (organica America) that you mentioned earlier. That product did work well as a bowel cleanser ( got my movements back to regular) But I never once saw any "creatures" in my BM's. ( I suppose that there may have been microscopic ones) I was a poo checking machine! As soon as I finished that 30 day cleanse I started 30 day humaworm and saw things within the first week. Nothing "Large" but things like liver flukes, big balls of "thread", and pinworms. Two of my children got the same results. My 13 yr old says on several occasions she saw things that resembled "slugs".
So Humaworm is the best that I have tried, Our second round is coming up in May, So I will be reordering very soon!