Plant Tannin for GI Support. Travel-Aid Necessity. Tabit is an herbal preparation indicated for acute or chronic loose stool lower intestinal cramps caused by bacteria or food-borne bacteria flatulence or related problems caused by stomach bacteria. Tabit is also suggested for general GI tract health especially when it is compromised by fungal yeast or bacterial infestation. Tabit contains a powerful tannin: the extracts of wild rhubarb root or Canaigre. It is complexed with Zinc and with Proline and Hydroxyproline amino acids.