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January 18, 2012


Chemical found in deodorants, face cream and food products is discovered in tumours of ALL breast cancer patients


・Parabens are a chemical compound found in everyday toiletry products.



・'The fact that parabens were present in so many of the breast tissue samples does justify further investigation,’ say study leaders.


A chemical widely used as a preservative in cosmetics, food products and pharmaceuticals has been found in tissue samples from 40 women with breast cancer.


A number of studies since 1998 have raised concerns about the potential role of these parabens in breast cancer as they possess oestrogenic properties.


Oestrogen is known to play a central role in the development, growth and progression of breast cancer.


Parabens are a chemical compound found in everyday toiletry products including moisturisers, make-up, shaving foam, tanning lotions and toothpaste.


moisturizer 保湿剤

They are also found in numerous brands of underarm deodorant. However, a causal link has never been found between them and breast cancer.


They are present in processed meats such as sausages, pies and pastries along with other savoury snacks.




Parabens are a chemical compound of para-hydroxybenzoic acid. They are most widely used in cosmetics to extend their shelf-life by protecting them from microbial growth.


para-hydroxybenzoic acid パラオキシ安息香酸

The most common parabens used in cosmetic products are methylparaben, propylparaben, and butylparaben.


methylparaben メチルパラベン
propylparaben プロピルパラベン
butylparaben ブチルパラベン

Less common types include benzylparaben and isobutylparaben.


benzylparaben ベンジルパラベン

These ingredients must be printed on the label.


Parabens are also used in drugs and as food additives.


They occur naturally in some foods like blueberries.


Parabens have been found to have an oestrogen-mimicking effect - however this is at a far lower level than the amount of oestrogen produced naturally in the body.


estrogen mimicking effect 疑似エストロゲン作用

The research team led by Dr Philippa Darbre from the University of Reading studied tissue samples from 40 women undergoing mastectomies between 2005 and 2008 for first primary breast cancer in England.

レディング大学のDr Philippa Darbre博士率いる調査チームは、英国で2005年と2008年との間に第1の原発性乳がんのために乳房切除術をした40人の女性患者からの組織サンプルを研究しました。

primary breast cancer 原発性乳がん

In total, 160 samples were collected, four from each woman. They found 99 per cent of the tissue samples contained at least one paraben and 60 per cent of the samples had five.

それぞれの女性から4つのサンプルで合計では160が集められた。彼らは、99%パーセントの組織サンプルに少なくとも1 つパラベンと60 % のサンプルに5つ含有していることを見つけた。

The team found women who didn't use underarm deodorants still had measurable parabens in their tissue, suggesting they must enter the breast from other sources.


Co-author Mr Lester Barr from the University Hospital of South Manchester, said: 'Our study appears to confirm the view that there is no simple cause and effect relationship between parabens in underarm products and breast cancer.

南マンチェスター大学病院の共同執筆者Mr Lester Barr氏は下記のように述べた。「私たちの研究は、脇の下用デオドラント剤製品と乳がんにおけるパラべンとの関係は単純な因果関係ではないという見解を確認するように思えます。」

'The intriguing discovery that parabens are present even in women who have never used underarm products raises the question: where have these chemicals come from?'


Dr Darbre added: 'The fact that parabens were detected in the majority of the breast tissue samples cannot be taken to imply that they actually caused breast cancer in the 40 women studied.


'However, the fact that parabens were present in so many of the breast tissue samples does justify further investigation.'






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