Keeping hydrated is one of the most important factors in maintaining good healthy skin that will make you look younger and reduce the problems that many people face with their skin as they age.
It is not sufficient to expect applications of moisturizers to keep the skin hydrated - it must come from within first and foremost and then the moisturizers will add additional support to maintaining good skin condition.
To remain hydrated you need to drink sufficient water throughout the day. Tea, coffee and other beverages are not a substitute for water and many of these drinks can actually cause dehydration.
If you are feeling thirsty then you are already becoming dehydrated. You need to drink water on a regular basis so you don't become thirsty and just because you might have heard that you need to drink 8 glasses of water per day you should be aware that drinking all the water at one time is in no way the correct method of remaining hydrated.
Also - drinking excessive amounts of water can be detrimental to your health as it can flush out too many nutrients from your body that are necessary to maintain a healthy youthful appearance.
Water is also a very good source of energy just as a lack of it will cause fatigue. When you have boundless energy you can't help but look younger and you will certainly feel younger which, at the end of the day, is the more important of the two.
Your skin will become lifeless and tired looking when dehydrated and you will be more susceptible to skin damage and wrinkles.