As the product specifies that it help to gain mass of your body. This actually means that Endura mass is helping your body to increase your body mass, not your muscles. If you think after taking Endura mass you’ll get Arnold type biceps and abs then it’s not gonna happen.
It helps you to gain your power so you can exercise and eat more and make your muscles hard.
But some of the guys take this in a wrong way, and yes endura mass is helping to gain muscles in your body, and you can gain your lost momentum.