I'd consider dry fasting easier and more effective than water fasting. For beauty I would suggest dry fasting over water as the effect it has on the skin is far greater. However extra precautions should be made. Drinking a tsp of baking soda before and after the fast to prevent kidney stones. Although you certainly could do an extended dry fast I am of the opinion now that shorter fasts can be just as beneficial if done right. Dry fasts allow you to get more benefits for the time spent doing it.