以往曾认为对于缺血性心脏病主要起保护作用的生理性抗氧化剂为维生素 E,而维生素 C、A 和胡萝卜素则作用较差。但新近的一些大规模随访研究则表明维生素 A,β-胡萝卜素或维生素 C 的摄入量增加者其发生缺血性心脏病的危险性或心血管疾病的死亡率显著降低,提示上述物质也可能具有保护作用。但因摄入量并不能精确反映体内含量,故对上 Physiological antioxidants that have historically been considered primarily protective of ischemic heart disease are vitamin E, whereas vitamin C, A and carotenoids are less effective. However, recent large-scale follow-up studies have shown that increased intake of vitamin A, β-carotene or vitamin C risk of ischemic heart disease or cardiovascular mortality was significantly reduced, suggesting that these substances are also May have a protective effect. However, because the intake does not accurately reflect the body content, so on