Drinking 6-8 glasses of water daily does not necessarily mean that your skin will be hydrated automatically. The water that you consume daily it first goes through your intestines, it gets absorbed into your bloodstream, filtered by your kidneys, and lastly absorbed by cells which aids in overall hydration.
The moisture in your skin can be preserved by avoiding the use of harsh soaps that can strip away natural oils. Use instead a mild, non-abrasive, alcohol free cleanser. Minimize your exposure to moisture depleting elements such as the sun, harsh winds, low humidity, alcohol, and prolonged baths.
Your diet plays a large role in promoting your skin’s ability to maintain its natural moisture. Include foods that are rich in essential fatty acids which are commonly found in salmon, flax seeds, walnuts, and olive oil. A healthy diet that includes three to five servings a week of these essential fatty acids will aid in reducing red, flaky, dry skin. Include some Chia in your diet. These wonderful seeds contain high levels of Omega-3 which your body needs but it does not produce. Omega-3's help keep skin hydrated. Chia seeds are hydrophilic, absorbing more than 10 times their weight in water.