Why is everyone so concerned about build up of products on hair?

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It seems that every hair based community I visit and all the blogs touting the no shampoo, baking soda, or conditioner washing programs talk about avoiding build up…but what exactly is build up? Some of this is originally from this post on build up from May 22, 2010…Build-up doesn’t have a specific definition, but it’s understood to...

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Discussion: Ingredients banned by Whole Foods

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There’s been a lively discussion about ingredients banned by Whole Foods in this post, so I thought I’d create a post for that topic here. (Here’s a link to Tony Dweck’s argument as to why many of these ingredients shouldn’t be banned.) I have been unable to find any rationale for why they ban these ingredients,...

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Question: Why are people washing their hair with baking soda and rinsing with vinegar?

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Sarah wrote in this post: I’ve seen your posts on co-washing, but wonder about the washing of hair with baking soda and then rinsing with vinegar… seems to be all the rave in blogland. Huh? Seriously? Really? What the heck is this all about? The idea is that you wash your hair with baking soda – pH...

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What the heck is a penetration enhancer?

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Some people would have you believe that everything can penetrate the upper layers of your skin – the epidermis – and make it into your bloodstream, creating all kinds of problems and “poisoning us from the inside out”. They will argue that nicotine and estrogen patches prove their case that things that go on our...

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Chemistry of our skin: Aquaglyceroporins

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Aquaglyceroporins are “membrane proteins that form water channels over cell membranes. They faciliate transport of water and solutes like glycerol or urea.” (This document, p. 78) In other words, aquaporins regulate the water flux in our skin (specifically in our epidermis, or outer layer of our skin). They are embedded in our cell membranes to help...

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