small shrubby tree (Tiliaceae/Malvaceae) native to the Himalayan region and distributed across South and Southeast Asia from Pakistan to Cambodia. the only species in the ~150-species Grewia genus that produces commercially edible fruit. small, deep purple berries with sweet-tart flavour — widely consumed as a summer drink called phalsay ka sharbat in Pakistan and India, considered a heat-relief tonic. short growing season, highly perishable — rarely exported, remains largely a regional fruit.

key named secondary metabolites include naringenin-7-O-β-glucoside, pelargonidin-3,5-diglucoside, cyanidin-3-glucoside, a novel δ-lactone from the flowers, and a range of phenolics. primary metabolites include glycosides, alkaloids, essential amino acids, saponins, mucilage, steroids, and fixed seed oil. glyburide and sulfonylurea-type compounds have been identified — the same class as pharmaceutical diabetes drugs.

fruits and leaves have substantial anticancer action against cancer cell lines. antitumor and in vitro cytotoxic activity against Ehrlich's ascites carcinoma cell lines is documented.

traditionally consumed as a therapeutic agent in diabetes and associated cardiovascular and kidney complications. fruit juice has a low glycemic index. anti-glycosidase and anti-amylase activity of aqueous fresh fruit extract was shown to be substantial, same mechanisms as pharmaceutical diabetes drugs acarbose and miglitol. phytochemicals glyburide and sulfonylurea-type compounds are potentially used to lower glucose levels.

fruit possesses radioprotective properties. documented specifically in studies on brain tissue of irradiated mice, where G. asiatica modulated radiation-induced biochemical changes in both cerebrum and cerebellum.

methanolic leaf extract revealed antimalarial and antiemetic effects. the plant contains an abundance of biologically active chemicals allowing it to control microorganisms through a variety of processes.

stem bark possesses analgesic and anti-inflammatory activities. fruit extract also documented for antipyretic and analgesic effects in animal models — consistent with traditional use for fever and pain.

it directly hits enzyme targets used by pharmaceutical diabetes drugs, has documented anticancer activity, protects the liver from oxidative damage, and has a uniquely studied radioprotective effect on brain tissue — relevant for anyone undergoing radiation treatment. it's also antimicrobial, anti-inflammatory, and a natural fever reducer.