Tuffrock GI (Gastro-Intestinal) Liquid is a world first super-energised colloidal volcanic mineral blend, with bioavailable collagen. Also contains toxin binders, and pH and acid stablisers for GI (Gastro-Intestinal) health. * Naturally works in the prevention of stress stomach ulcers.* Relieves gut stress with alkaline action to quickly normalize gut acid.* Acetic acid stabilizer to assist with stress colic, gently expels unwanted protein, bacteria or toxins within manure to help cool horses.* Collagen helps strengthen stomach linings.TR recommends use GI to normalize gastric challenges and prepare the gut for TuffRock C+ or EJFTuffRock G.I. is a new approach for horse gut stress designed to focus on the cause …not the symptoms …TuffRock G.I. is manufactured from our unique range of 100% Australian natural colloidal volcanic minerals with gut acid normaliser and gut toxin binder.Lovely earthy taste means easy to paste by syringe over the tongue or add to feed.