Harker Herbals Bowel Cleanse 500mlHarker Herbals Bowel Cleanse 500ml About Vitamins. co. nz Harker Herbals Bowel Cleanse Bowel Cleanse supports the natural eliminatory functions of the lower intestinal tract and bowel by gently encouraging peristaltic movements and also toning bowel tissues. Non habit forming, it can be safely taken over several weeks. The elixir contains black pepper, and Carrageen to lubricate the bowel. It also contains rhubarb and senna to support regularity, and