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Fri Sep 01, 2006 12:05 pm  |
I just started using 20% Vit C and I'm loving the effects. I have pretty stubburn skin that can take almost anything and I was wondering if theres anything higher than 25%? And of course if its ok to use.
Icy. |
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21, oily acne prone skin. |
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Fri Sep 01, 2006 1:59 pm |
IcyFire I don't think it would be advisable to use a C serum that has more than 20% Vitamin C. I got this from the IS Clinical website, " Concentrations of Vitamin C of 15-20% are completely absorbed. Concentrations less than this are much, much less effective and produce less effective levels of the vitamin within cells. Above a 20% concentration, absorption actually decreases, although the reason for this still remains unknown".
I don't recall where but I have also read the same information elsewhere. |
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Fri Sep 01, 2006 2:21 pm |
| That is good to know - not that I was planning on anything more than a beginners % to start with. |
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Fri Sep 01, 2006 6:58 pm |
thanks theresa. tho I dont quite understand why higher would be less absorbable...  |
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21, oily acne prone skin. |
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Fri Sep 01, 2006 7:02 pm |
Don't feel so bad IcyFire apparently the experts at IS Clinical don't understand it either. 
Above a 20% concentration, absorption actually decreases, although the reason for this still remains unknown |
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Fri Sep 01, 2006 7:03 pm |
| I also read research showed 20% was the highest you could go to be useful to the skin, after that the extra is redundant or possibly irritating. |
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