(20R)-Protopanaxadiol

1. (20R)-Protopanaxadiol ((20R)-Protopanaxdiol) has the effect of anti-tumor through increasing the activity of body immunity, inhibiting tumor interstitial microvascular density and its proliferation activity, improving the lymphocyte transformation, the activity of NK cells and the contents of IL-2 significantly. 2. (20R)-Protopanaxadiol prevents and heals obesity, fatty liver and hypertriglyceridemia in mice fed with a high-fat diet.