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Wed Feb 28, 2007 10:18 pm  |
| i'm curious to try these out to help control breakouts and know that you're supposed to start with the 2% bha for about a month before graduating to the bha/aha combo which gets such raves here - my question is, how long does the full size bottle last? should i order a full 4 oz or just a 1 or 2 oz sample size? is the bha/aha that much better than the plain bha? |
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Thu Mar 01, 2007 5:39 am |
BHA and AHA are both exfoliates, but both work differently and exfoliate differently. For many people both are very beneficial and used together can create a synergy effect, allowing both acids to work better together then they do alone.
Many peop0le find skins normal exfoliation rate slows with age, and acids help maintain the exfoliation rate normally seen in youth. Keeping skin fresh looking. Various skin conditions also benefit for increased cell turn over.
AHA is Alpha Hydroxy Acid, It is mainly a surface exfoliate. It works by loosening the attachments/ or “glue” that hold dead skin cells together helping them separate easier.
AHA helps brighten dull skin, Soften fine lines, and freckles and discolorations, refines skin surface, and is beneficial in treating UV damaged and aged skin. Can also help some in treatment of acne, which is related to dead cell build up on skin surface that blocks pores. It is not lipid or oil soluble, it cannot penetrate into or clean out pores very well.
At appropriate strengths can increase collagen levels in the skin, and contribute to removal of precancerous cells.
BHA is Beta Hydroxy Acid. It works mainly as a pore exfoliation product. It can move through skin surface oils, so can penetrate into skin pores where it can loosen dead cells, oils and debris from inside pore walls. This enables it to reduce pore size, and help remove clogs that can contribute to acne, white heads, blackheads and Mila. Anti oxidant and anti inflammatory effects enable it to benefit sensitive skin, and contribute to acne treatment issues which can be inflammation related.
Not a very effective surface exfoliate, will not help much on fine lines, discoloration, brightness etc compared to AHA.
It is very good for oily or acne prone skin. And can help AHA to work better because of its ability to penetrate through skin oils, giving the AHA a better “working” environment to penetrate better.
Both AHA and BHA can assist other products to penetrate better into the skin by both the skin thing action, dead cell removal (which creates a difficult to penetrate layer) and through BHAs ability to penetrate through oils.
A 4 ounce bottle if applied once daily with hands, not a cotton ball, will last many months. |
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Thu Mar 01, 2007 6:22 am |
| thanks! i was also wondering if you know how i feel pretty's 2% compares to skin biology's? the one thing i'm not crazy about with the former is that it includes propylene glycol . . . |
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Thu Mar 01, 2007 6:47 am |
| IFP has a lower pH, so actually "stronger" - more penitrating, more "active" it is a liquid version. |
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