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comedogenicity

 
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guest
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PostPosted: Tue Mar 08, 2005 7:44 pm    Post subject: comedogenicity Reply with quote

Comedogenicity is rated on a scale between 0-5 . I know that isopropyl miristate rate 5. can you list 5 of the most comedogenic ingredients ? what is the rating of mineral oil & petrolatum ?
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drtodorov
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Joined: 10 Dec 2004
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PostPosted: Wed Mar 09, 2005 3:49 am    Post subject: Reply with quote

These ratings are rather crude since comedogenicity testing, if any, is often done with pure ingredient or highly concentrated solution on animal skin, whereas in real life it usually is low conentration and human skin (and the dependency between comedogenicity and concentration may be different for different ingredints). That said, both mineral oil and petrolatum are somewhat comedogenic. Perhaps 3 or 4 on that scale.
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Arlene
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PostPosted: Mon Mar 14, 2005 3:58 pm    Post subject: comodogenicity Reply with quote

here we go again , conflicted information . On the website www.dermadoctor.com the article on comodogenicity : " mineral oil rating is 0 " .
you say 3-4 . who's right ?
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drtodorov
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PostPosted: Mon Mar 14, 2005 8:33 pm    Post subject: Reply with quote

I gave you a ballpark, I haven't see actualy comedogenicity data on mineral oil specifically, but most oils are at least somewhat comedogenic. That said, I'd be able to tell for sure only if I find the raw data from actual comedogenicity tests.
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