生物谷报道：美国新罕布什尔州达特茅斯医学院研究人员最新研究发现，每天喝几杯茶可以减少患两种常见皮肤癌的危险。
研究作者Judy R. Rees博士领导的研究小组在研究了2200名成年人的饮食习惯和健康状况之后发现，喝茶的人患鳞状细胞癌和基底细胞癌这两种常见皮肤癌的危险较小。每天喝茶一杯以上的人，患这两种癌的可能性比不喝茶的人低20%至30%。
研究指出，茶中含有一种名为EGCG的抗氧化剂，能限制紫外线辐射对皮肤的伤害。在过去几十年一直喝茶、且每天至少喝两杯茶的人身上，这种效果更加明显。
研究小组也指出，上述发现并表示只要喝茶就不用防晒。因为目前还没有证据显示，喝茶可降低多次将皮肤晒到发痛的人罹患皮肤癌的危险。
(资料来源 : biocompare)
原始出处:
Journal of the American Academy of Dermatology
May 2007 (Vol. 56, Issue 5, Pages 781-785)
Tea consumption and basal cell and squamous cell skin cancer: Results of a case-control study
Judy R. Rees, BM, BCh, PhDade, Therese A. Stukel, PhDf, Ann E. Perry, MDb, Michael S. Zens, PhDa, Steven K. Spencer, MDc, Margaret R. Karagas, PhDade</FORM>-->
Accepted 26 November 2006 published online 3 February 2007.
Lebanon and Hanover, New Hampshire, and Toronto, Ontario, Canada
Background
Tea constituents, including polyphenols, are hypothesized to have chemopreventive properties, and inhibit the induction of skin cancers in animal models.
Objective
To explore the association between regular tea consumption (≥1 cup/d for ≥1 month) and the incidence of squamous cell (SCC) and basal cell (BCC) carcinomas.
Methods
A population-based case-control study of 770 individuals with BCC, 696 with SCC, and 715 age- and sex-matched control subjects.
Results
After adjustment for age, sex, and lifetime history of painful sunburns, ever having consumed tea regularly was associated with a significantly lower risk of SCC (odds ratio [OR] = 0.70; 95% confidence interval [CI] 0.53-0.92), especially among long-term drinkers (≥47 years consumption: SCC, OR = 0.49; 95% CI 0.29-0.83; P for trend = .008) and among those consuming ≥2 cups/d (OR = 0.65; 95% CI 0.44-0.96; P for trend = 0.013). After adjustment for age and sex, ever having consumed tea regularly was weakly associated with BCC risk (OR = 0.79; 95% CI 0.63-0.98).
Limitations
Our case-control study was susceptible to recall bias and to confounding by unknown cancer risk factors associated with tea consumption.
Conclusions
Our findings support the existence of an inverse association between tea consumption and skin carcinogenesis.
Abbreviations used: BCC, basal cell carcinoma, CI, confidence interval, NMSC, nonmelanoma skin cancer, OR, odds ratio, SCC, squamous cell carcinoma
