Not a good idea. Fasting for 2 weeks is not a good idea and is generally considered unsafe from a medical perspective. Clearly, for various reasons it has been done and people have survived it, but it is very unhealthy and I would strongly recommend against doing so no matter what the reason for desiring to do so.
Little Benefit. Why do you want to fast for two weeks? People fast for many reasons and although a couple of days of fasting is unlikely to be harmful, two weeks of fasting could lead to dehydration, nausea, fatigue, and weakness. This is a nice article about the myths of the "master cleanse": http://www. Livestrong. Com/article/116670-myths-master-cleanser/.