The structure of guar gum is close to that of locust bean gum (E410). It is obtained by grinding guar seeds and used as a thickener and stabilizer because of its water retention property. Consumed in high doses, it can cause intestinal discomfort (bloating, flatulence, laxative effect). Rare allergic reactions have been reported (mainly asthma and rhinitis). As for the flour of carob seed, certain studies evoke a less absorption of vitamins and minerals which would be trapped by the viscous mesh formed by the polysaccharides of the gum of guar. Conversely, a positive cholesterol-lowering effect has been reported in other studies. The use of E412 is prohibited in certain confectionery because of a risk of choking, especially for children and the elderly.
Very many food categories, prohibited in some confectionery (choking hazard), allowed in some baby foods only.