Keeping yourself healthy on the inside can make an enormous difference to the way you look on the outside.
One look at the before and after photos of people who've embarked on a raw food diet show quite clearly that we really are what we eat. All those phyto nutrients and anti-oxidants can make a considerable difference.
One really important factor in your skin health and in fact all the membranes in your body are the levels of essential fats. Your body cannot make omega 3 and omega 6 (that's why they are called essential) and they must be consumed in the right balance to be fully effective.
Another factor is drinking enough water. The human body is about 70% water and even a loss as little as 2% can cause serious effects. So many of us are at least mildly dehydrated and this has a number of consequences affecting concentration, energy levels and the health of your skin.
Find out more about dehydration
Obviously some issues on skin health are a little more complicated than just oil and water and for those you may need to see a nutritionist to get to the root of the problem.