Various parts of the locust bean tree are used for medicinal and food purposes. Several species are known as African locust bean. Guar gum has synergistic effects with locust bean gum and sodium alginate. Indigenous healers in Africa use different parts of the locust bean tree for health benefits. Foliage of locust bean has been found to contribute to soil fertility improvement. Unlike locust bean gum, it is not self-gelling. Guar gum has proven as useful substitute for locust bean gum (made from carob seeds). Shade tolerance of other crops planted the near locust bean tree may present additional problems. Furthermore, tara gum shows an intermediate acid stability between locust bean gum and guar gum. Locust bean gum occurs as a white to yellow-white powder. Shoe polish and insecticides also have locust bean gum powder as an additive.