If you are looking to improve dry skin or just balance out moisture in general, your best pathway to also reducing the common signs of aging or at least preventing them is to use more water.  Drink more water, at least 8 cups per day.  Water is of course a natural moisturizer, and your body is made up for the most part of this particular liquid.  There are plenty of low calorie drink mixes to use in order to drink more if you don’t actually like the taste of water, and frankly it’s important.  It can get your body moving in general, flushing out many toxins in and of itself and keeping you regular. 

When it flushes out toxins, it often also flushes out free radicals, both of which could easily hurt the skin and increase the natural progress of wrinkles.  And if you are dehydrated, your skin will be the first part of your body to really visibly suggest it.  So in short, if you have dry skin or overly oily skin, chances are you are not drinking enough water to balance it out, and your skin is reacting by creating that generalized problem.  So logically speaking, the answer is to drink more water and deal with it in that particular fashion.