The present invention relates to a method for recovery from fatigue, increase in strength or muscle, weight loss, etc. according to an increase in energy by using a natural substance that enhances the generation of energy in the body. The present invention relates to a preparation method that is optimized by adding a Dipsaci radix extract and a fermented strain for reinforcing the efficacy thereof, and through this, by increasing the generation of energy by oral intake, the effects of recovery from fatigue and increasing muscle or muscle strength can be exerted, and the effect of weight loss can be obtained by diet control. In addition, by anti-aging, antioxidant, mitochondrial activation, and increasing the generation of energy according to muscle strength improvement, the effect of preventing degenerative diseases can be provided.