Anabolic and androgenic steroids are available as prescription medications to be used in cases in which the body does not make enough hormone and supplementation may be required. Some hormone supplements in this pathway include growth hormone and testosterone itself. These medications are legally prescribed by health-care providers, but this group of drugs is often used illegally and abused to help increase athletic performance and improve body appearance. When used in a well-nourished body, anabolic steroids will cause weight gain primarily due to an increase in muscle mass.
The rate of turnover in a metabolic pathway, otherwise known as the metabolic flux , is regulated based on the stoichiometric reaction model, the utilization rate of metabolites, and the translocation pace of molecules across the lipid bilayer .  The regulation methods are based on experiments involving 13C-labeling , which is then analyzed by Nuclear Magnetic Resonance (NMR) or gas chromatography-mass spectrometry (GC-MS) -derived mass compositions. The aforementioned techniques synthesize a statistical interpretation of mass distribution in proteinogenic amino acids to the catalytic activities of enzymes in a cell. 
Very little really surprises me on the sports supplement market nowadays as I’ve honestly tried it all before and the fact that I rarely use any one product twice should tell you all you need to know. I admit I was initially drawn to Testo Extreme Anabolic by the unique approach it takes to muscular development and I thought it would be fun and interesting as I have not seen anything like this product before. I’m now on my third course using the Testo and Decacore Creatine combo and have consistantly seen improvements in my workouts and physique with each course! My advice? When you finally find something that works for you, stick with it!