In how many days endura mass will shows its effect...i am 18 yrs old and my weight and height is 47 kg and 176 cm respectively?

Hard to speculate: This supplement like any other nutritional product just provides access to your system to nutrients that it may need as you pursue your workouts. There is no guarantee that it will add anything to what your normal diet and workout routine will provide. Much of these supplements end up in your poop or pee within a day unused/unneeded. If you work hard and intensify your workouts you may see benefit