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Got hard water? Water that comes from limestone or sandstone aquifers in particular tends to contain minerals which cause it to be "hard." Primarily calcium and magnesium. These minerals interfere with many detergents, including soap. They can deposit on your skin, your shower, in plumbing. People with itchy skin or eczema and dermatitis often try (or at least wonder about) water softeners to relieve their symptoms. First off, a shower-head water filter does nothing to remove minerals from water. These filters can remove chlorine and some "heavy" metals, but do not soften. That's another story. ©Science-y Hair Blog 2013 A study in England tested 336 children, ages 6 to 16 years of age. All had eczema. All were treated for eczema with medication, but half were also given an ion-exchange water softener to test for 12 weeks. Nurses evaluated the physical eczema symptoms and found no difference in measurable indicators of disease  between the group which used soften...

You know it’s coming. Winter. If you live in the more Northerly latitudes, especially away from the oceans, this means cold, dry air, indoor heating and generally a desiccated time for your skin and hair. Itchy skin, rough, cracking hands, chapped lips, windburn… ©Science-y Hair Blog 2013 Dry, rough skin on feet This is going to be similar to the “sensitive skin” post because dry skin is sensitive skin – it’s more vulnerable to tearing and injury, loses more water, you want to scratch the itch which damages skin. ©Science-y Hair Blog 2013 The ability to respond to dry environments is where skin and hair diverge. Skin can try to respond to this but hair cannot. The stratum corneum (upper layer of skin) contains “Natural Moisturizing Factor” a blend of lipids and humectants (fats and water-attracting chemicals) which attract and hold water - the key ingredient that keeps skin soft, flexible and moist (as opposed to cracking, peeling and flaking). When the air gets dry, your skin starts b...