We prepared anthocyanin-rich extract from purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) cultivar (PSP-ANT) and examined hypotensive effect of PSP-ANT in Spontaneously T hvpertensive rats (SHR). After a single ingestion (400mg/kg p.o.) of PSP-ANT, a significant decrease of svstolic blood pressure (p < 0.05) was observed at 2 hours postadministration and the decrease was prolonged until 8 hours postadministration in SHR. The antihypertensive effect was also observed in a long-term ingestion (0.1 and 0.2%' diet for 8 weeks) of PSP-ANT in SHR. After stopping the feed of PSP-ANT, the svstolic blood pressure was almost the same as that of SHR fed control diet.
