Which is better to gain weight protinex or endura mass?

Neither: Why do you want to gain weight? If you are otherwise healthy, being skinny is okay. With age you will gain weight and look back at these days with fondness when you could eat and not gain weight. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.