Tuesday, June 22, 2010

Where do i get ';Neutrogena';sunscreen and cleanser in Chennai?

Before you use sunscreen you should know that it is a subject of fierce debate right now whether sunscreen prevents skin cancer or it increases the incidences of skin cancer (especially malignant melanoma). Unfortunately the opinions of the sunscreen skeptics are far underrepresented in the popular press - probably due to the financial interests of the cosmetic industry.


First of all: skin cancer and sunburn are caused by totally different mechanisms. Sunburn is caused by the direct DNA damage that is triggered by UVB. In contrast the malignant melanoma - which causes most fatalities - is nearly exclusively caused by the indirect DNA damage that stems from free radicals. Many sunscreens prevent the direct DNA damage but they increase the amount of free radicals.


Sunscreen is supposed to stay on the surface so that it does not get in contact with living tissue. Unfortunately a small fraction of the chemical substances always penetrates through the epidermal barrier with time. When sunscreen molecules are in contact with living tissue and then they are excited they become very reactive and the free radicals that are produced damage the DNA.


All this is happening even so the sunburn (direct DNA damage) is prevented.


Free radicals cause cancer.





In agreement with the lab-data the medical statistics show an increased melanoma risk for sunscreen users compared to non-users. See wikipedia: ';sunscreen';Where do i get ';Neutrogena';sunscreen and cleanser in Chennai?
Try spencers plazaWhere do i get ';Neutrogena';sunscreen and cleanser in Chennai?
wwalmart.


wallgreens.


cvs.

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