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Is there such thing as a sunscreen that won't clog pores??

I am using a certain line of ance mediacations, and they are working great, but im afraid if i use normal sunscreen on spring break at the beach, it will clog my pores and make my acne come back. Does anyone make a sunscreen or suntan lotion that wont clog pores?? Thanks.
ummm..yeah hat GREAT. i really didnt need to know about that. i KNOW what UV rays can do to you skin and i know about melanoma, i am currently learning about it, i really didnt need an answer about melanoma and skin cancer. thats why I CHOOSE TO WEAR SUNSCREEN. i just dont want to waste my money on the acne medication if i am gonig to use sunscreen that clogs my pores!!!!
and who cares if you are a photochemical whatever!!

More important than the pores is the question whether sunscreen prevents, or actually promotes malignant melanoma. This is strongly discussed in the scientific literature since long, and due to the - allegedly - long time lag between the sunburn in childhood and the melanoma this discussion continues.

Whether sunscreen does prevent skin cancer or not is actually a subject of fierce debate right now. 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: Melanoma 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. All sunscreens prevent the direct DNA damage but many of them 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. But Free radicals do not create a warning sign in your body.
The cosmetic industry has used substances like benzophenone, psoralen, coumarin, TiO2. All these substances are known to be photosensitizers for harmful reactions. This means that they amplify the production of free radicals from UV-light.
The molecules that remain on the surface of the skin filter the UV light and thereby reduce the skin cancer risk. But if they penetrate into the skin even small amounts of these substances - as little as 1% of the applied sunscreen - is enough, to increase the amount of free radicals. This has been measured in several experiments.
In agreement with this lab-data the medical statistics show an increased melanoma risk for sunscreen users compared to non-users. See wikipedia: "sunscreen"

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