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Hot or cold air, low humidity, frequent contacts with water or cleansing solutions ruin protective layer, and skin loses its natural ability to hold moisture. When water level in skin drops by 10%, skin becomes dry, itchy and flaky.
As we age, skin's protection mechanism slows down and skin becomes dry. In some people dry skin is inherited genetically.
Even though outermost skin layer is made of dead cells, we have to take care of it. The primary function of horny layer is protection of deeper skin layers, where new cells are born. Regular use of hydrating creams helps to prevent water loss, restore moisture balance and elasticity of outer skin layer and help it do its job.
Oils, mucopolysaccharides, and fatty acids are widely used in cosmetics to prevent water loss. The most effective cosmetic ingredients for this purpose are liposomes, ceramides and sphingolipids.
Liposomes are microscopic spheres that can be used to encapsulate water, vitamins or other beneficial ingredients. Because these elements are similar in structure to cell membrane, they are easily utilized by skin. They can penetrate skin surface, bind with it and release substances they carry.
Ceramides and Sphingolipids are elements that hold skin cells together so that environment can not get in and moisture can not get out. Lipids are lost with age, and moisture barrier is weakened. Research shows that applying ceramides topically has effect of generating ceramide production in skin, thereby increasing lipid content and reinforcing protective barrier.
Look for creams with above ingredients to keep your skin in its best condition and defy aging.
Natalie Katsman is a co-founder of http://www.natural-aid.com, where you can find fine quality aloe vera products for beauty and well-being and subscribe to HealthySkin Newsletter filled with beauty tips, recipes and information on herbal healing, skin care and cosmetic chemistry.