LivingBlessed,
it is true that fasting will lower metabolism, which is Natures way of conserving your food reserves, so that in the case of food shortages or the need to abstain from external food sources for the recovery from disease/injury, they will last as long as possible for the maximum amount of healing and cleansing.
Fasting will obviously bring about weight loss, but as golthing has mentioned there are numerous other health-benefits to be had which are just not achieved by exercise alone.
However, this exercise programme has been proven to be extremely efficient in losing weight permanently, but also has incredible cardio and lung benefits to name just two and where it is highly recommended in achieving those aims. It is also endorsed by research findings from several Harvard studies..............