The effect of alpha-tocopherol on the hypocholesterolemic action of sesamin was examined in rats given a cholesterol-enriched diet. When different levels (0.05 and 0.2%) of sesamin were fed, the supplementation of 1% alpha-tocopherol significantly accentuated the hypocholesterolemic action of sesamin, particularly with the higher sesamin level, although alpha-tocopherol alone did not affect the concentration of serum cholesterol. The dose-dependent promoting effect of alpha-tocopherol on the hypocholesterolemic action of sesamin was confirmed by supplementing different levels (0.2 and 1%) of alpha-tocopherol to a fixed level of sesamin (0.2%). alpha-Tocopherol was still effective at the 0.2% level. The metabolism of sesamin in the liver S9 fraction appeared to be interfered with alpha-tocopherol in vitro, suggesting a possible role of alpha-tocopherol in maintenance of the availability of sesamin.
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