Eligator Anabolic Gainer – 2lbs, 900gm (Choco Bourbon) Anabolic weight gainer refers to the use of anabolic to induce mass gain. When it comes to fitness and bodybuilding the term relates to muscle buildup, so when it is used along with mass, it refers to muscle building with mass .There are a lot of ways to gain weight or muscle mass, but when talking about an anabolic muscle builder the best option would be a mass builder supplement to help enhance your workouts and diet / nutrition for faster and long lasting results. A mass builder can come in many forms, but they’re all about the same thing, providing your body with a substantial amount of the daily calorie intake you need.