Guar gum (GG) and Guar gum/borax (GGb) hydrogels are studied by means of rheology. Low Field Nuclear Magnetic Resonance (LF NMR) and model drug release tests. These three approaches are used to estimate the mesh size (ζ) of the polymeric network. A comparison with similar Scleroglucan systems is carried out. https://thebrickes.shop/product-category/chests/