Anabolic processes tend toward "building up" organs and tissues . These processes produce growth and differentiation of cells and increase in body size, a process that involves synthesis of complex molecules . Examples of anabolic processes include the growth and mineralization of bone and increases in muscle mass. Endocrinologists have traditionally classified hormones as anabolic or catabolic, depending on which part of metabolism they stimulate. The classic anabolic hormones are the anabolic steroids , which stimulate protein synthesis, muscle growth, and insulin .  The balance between anabolism and catabolism is also regulated by circadian rhythms , with processes such as glucose metabolism fluctuating to match an animal's normal periods of activity throughout the day. 
If you are going to start your first cycle soon, 'how to inject' is probably that last thing that you are worried about. You would have started by conducting research on the different injectable anabolic steroids available in the market, whichyou think can help you reach your goal. But when you have the vials and the syringes in front of you, you will surely think about how you will get the steroid out from the bottle and into your body. At this point, some people will become exasperated and even give up. Here is some information on injecting anabolic steroids.