生物谷報(bào)道：美國(guó)新罕布什爾州達(dá)特茅斯醫(yī)學(xué)院研究人員最新研究發(fā)現(xiàn)，每天喝幾杯茶可以減少患兩種常見皮膚癌的危險(xiǎn),。
研究作者Judy R. Rees博士領(lǐng)導(dǎo)的研究小組在研究了2200名成年人的飲食習(xí)慣和健康狀況之后發(fā)現(xiàn),，喝茶的人患鱗狀細(xì)胞癌和基底細(xì)胞癌這兩種常見皮膚癌的危險(xiǎn)較小。每天喝茶一杯以上的人,，患這兩種癌的可能性比不喝茶的人低20%至30%,。
研究指出，茶中含有一種名為EGCG的抗氧化劑,，能限制紫外線輻射對(duì)皮膚的傷害,。在過(guò)去幾十年一直喝茶、且每天至少喝兩杯茶的人身上,，這種效果更加明顯,。
研究小組也指出，上述發(fā)現(xiàn)并表示只要喝茶就不用防曬,。因?yàn)槟壳斑€沒(méi)有證據(jù)顯示,，喝茶可降低多次將皮膚曬到發(fā)痛的人罹患皮膚癌的危險(xiǎn)。
(資料來(lái)源 : biocompare)
原始出處:
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
