Aspalathin is a C-linked dihydrochalcone glucoside found in rooibos tea, a herbal tea prepared from the South African rooibos plant, Aspalathus linearis (Fabaceae). Aspalathin is a C-linked dihydrochalcone glucoside found in rooibos tea, a herbal tea prepared from the South African rooibos plant, Aspalathus linearis (Fabaceae).