They're pricey, but the Dr. Alkaitis products have been a miracle for my skin:
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http://www.alkaitis.com/
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Start with the travel kit -- everything in it lasts MUCH longer than it says on the website, cause it's super concentrated and you use SO little. I bought a full-size face wash about 6 months ago and I'm less than halfway through it, so to me it's a major bargain, even though you pay a lot up front.
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I had TERRIBLE acne in the beginning of this pregnancy. And it was all over my neck, to the point where I wouldn't go outside without a scarf, no matter what the temperature. My face was pretty bad, too. I started using the Dr. Alkaitis stuff and it cleared up within a week and my skin has been the best it's been in my entire life (seriously) ever since.
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And definitely avoid dairy, it's full of hormones and other crap that are terrible for your skin.