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Capparis decidua (C. decidua) is an important medicinal plant from the family Capparaceae. The present study explores the proximate (moisture, protein, crude fiber, dry matter) composition and minerals profile of various parts including stem bark, fruit shoot, root and flower of C. decidua harvested from Cholistan desert, Punjab, Pakistan in two seasons i.e., April and September. C. decidua fruits contained relatively higher amounts of proximate constituents followed by the flowers especially in case of protein while stem bark and roots mainly contained fiber. In comparison with other parts, the content of minerals was higher while traces of heavy metals i.e. Ni, Co and Cd were recorded in C. decidua fruits and flowers. Overall, harvesting seasons exhibited a significant (p<0.05) effect on the distribution of most of the constituents within different parts of Capparis decidua. The samples collected in September were found to be richer in protein and minerals and vice versa. The results of this study support that C. decidua fruits and flowers can be explored as a viable source of minerals and vegetable protein both for human beings and livestock to supplement nutrition.