Skin dehydration is not just a problem in winter. Environmental changes in the seasons, heating and air conditioning, UV damage, medical conditions and lifestyle choices such as smoking, and dietary intakes high in salt, sugar and stimulants such as coffee and tea, all have an impact on skin hydration.

Here are a few helpful product ingredients that professionals recommend.
Niacinamide: A form of Vitamin B-3 that impacts ceramides and fatty acids in the stratum corneum of the skin. Research has shown that Niacinamide can decrease transepidermal water loss (TEWL), by up to 20% in 24 days.₁
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Hyaluronic Acid: Well known and loved for its hydrating properties, it also plays a critical role in wound repair and the healing process. When the natural levels of Hyaluronic Acid in our skin degrades, the skin can become dehydrated and fine lines and crepey skin can become more prominent.₂
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Acetyl Hexapeptide: Not only has this ingredient had a dramatic impact on the visible signs of aged skin, it also plays an important role in skin hydration. Aquaporin is a protein in the skin that plays a key role in the movement of fluids between the basal layers of the epidermis and the strateum corneum, which impacts hydration and collagen production.
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1. D Bissett, Topical niacinamide and barrier enhancement, Cutis 70 6 suppl 8–12 discussion 21–23 (Dec 2002)
2. http://en.wikipedia.org/wiki/Hyaluronan