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通过对２４例鼻咽癌患者配对分组研究，观察两组患者早期放疗反应，并检测两组患者血清中的脂质过氧化物（ＬＰＯ）、维生素Ｅ（ＶＥ）、超氧化物歧化酶（ＳＯＤ）和唾液酸（ＳＡ）含量。结果表明：口服ＶＥ组较对照组患者放疗反应轻；放疗前患者体内自由基含量高，而自由基清除剂含量下降，放疗初期对照组患者体内上述指标近于正常，继之又出现异常；而口服ＶＥ组则维持正常水平，说明ＶＥ有助于清除肿瘤患者体内自由基，维护体内自由基代谢平衡，降低放疗反应。
Through paired grouping study of 24 patients with nasopharyngeal carcinoma, the early radiotherapy response was observed in both groups, and the levels of serum lipid peroxide (LPO), vitamin E (VE), superoxide dismutase (SOD) ) And sialic acid (SA) content. The results showed that patients in the oral VE group had a lower response rate to radiotherapy than those in the control group. Before radiotherapy, the content of free radicals in the patients was high while the content of free radical scavengers decreased. In the early radiotherapy group, the above indexes in the control group were almost normal, followed by abnormalities. Oral VE group was maintained at normal levels, indicating that VE can help clear the body of patients with tumor free radicals and maintain the balance of free radical metabolism and reduce radiation response.