The effects of aqueous extracts of Kuding tea (Ilex latifolia Thunb.) and the large-leaf form of Camellia sinensis var. sinensis), chrysanthemum (Dendranthema morifolium Ramat), honeysuckle flower (Lonicera japonica Thunb.), and purple sweet potato (Ipomoea batatas) stem on glucose absorption were investigated using Caco-2 cells. Glucose absorption by Caco-2 cells was significantly inhibited by aqueous extract of Kuding tea, chrysanthemum and purple sweet potato stem under both Na+-dependent conditions and Na+-free conditions indicating effects...