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LOGIC BEHIND CONCENTRATIONS OF PRODUCTS???

 
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inna



Joined: 26 Sep 2008
Posts: 7
PostPosted: Sun Dec 07, 2008 1:56 am    Post subject: LOGIC BEHIND CONCENTRATIONS OF PRODUCTS??? Reply with quote
I would like to know if skin becomes addictive to given concentrations and needs more and more % with a time, and if so- what to do?
And also- may be someone knows recipie for good tonic which can be used instead of washer and water(means just tonic alone for grease and make up?) Thank you for suggestions. I am fasinated with this forum, but very new to DIY cosmetics.
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drtodorov
Site Admin


Joined: 10 Dec 2004
Posts: 3177
PostPosted: Mon Dec 08, 2008 10:49 pm    Post subject: Reply with quote
This has not been studied much but generally speaking some degree of tolerance is possible for some actives. It may be wise to rotate your actives.
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