一、植物性食品中的抑癌物质1 .类胡萝卜素　近年发现 ,黄绿色蔬菜和果品中所含 β-胡萝卜素 (β-carotine)具有防癌作用。尽管也有可资证实其期望效果的报道 ,但还远未达到取得确定性结论的地步。值得注意的一点是 ,迄今之单用β-胡萝卜素进行的研究未必恰当。实际上 ,β-胡萝 1. Carcinoid substances in plant foods 1. Carotenoids In recent years, β-carotine contained in yellow-green vegetables and fruits has been shown to have anti-cancer effects. Although there are also reports that can confirm its expected effect, it is far from reaching the point where certain conclusions are reached. It is worth noting that the studies conducted so far using β-carotene alone may not be appropriate. In fact, beta-carrot