Guar gum shows viscosity synergy with xanthan gum. Guar-based compounds, such as hydroxypropyl guar, have been in artificial tears to treat dry eye. Examples of such substances are xanthan and guar gum. Examples of vegetable gum fibers are guar gum and gum arabic. More appropriate gelling agents are linear polysaccharides, such as guar gum, cellulose, and their derivatives. Other possibilities include nitrated guar gum. The rheological properties of borate cross-linked guar gum hydrogel mainly depend on the pH value. In Europe, guar gum has EU food additive code E412. Jodhpur leads in Handicraft and Guar Gum industry. The rheology of guar gum is typical for a random coil polymer. The commercial production of guar gum normally uses roasting, differential attrition, sieving, and polishing. Food-grade guar gum is manufactured in stages. Lower concentrations of guar gelling agents are needed when linear guar chains are cross-linked. The world production for guar gum and its derivatives is about 1.0 Million tonnes. Other crops are guar, bajra, sugar cane and grams.