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过去许多资料报道砷与癌症相联系,国际癌症中心也将砷列为对人类具有致癌性的物质。但近来,许多砷的致癌实验与流行病学调查表明,砷对癌的作用具有两面性,即在正常情况下砷对癌具有抑制作用,而长期摄入超过机体耐受量的砷化物后,才具有致癌性。福雷斯特等人所做实验证明,以通常吸收形式存在的砷是抗癌的,它通过增强干扰素的作用而抑制了肿瘤的发生。福雷斯特报道,长期应用小剂量砷化
In the past many sources reported that arsenic is associated with cancer and that the International Agency for Research on Cancer lists arsenic as a substance that is carcinogenic to humans. Recently, however, many carcinogenic and epidemiological studies of arsenic have shown that arsenic has a dual effect on cancer, that is, arsenic inhibits cancer in normal conditions and that after long-term ingestion of arsenide that exceeds the tolerance of the body, Carcinogenic. Experiments by Forrest et al. Have demonstrated that arsenic, which is present in the usual form of absorption, is anti-cancer and inhibits tumorigenesis by enhancing the action of interferon. Forrest reported long-term use of low-dose arsenic