Back to what was described above. Testosterone in this combination is usually the main component as it promotes muscle growth, recovery, and supports overall body health. EQ is known for increasing red blood cell counts, which helps improve endurance and overall performance, and can also affect appetite and vascularity. Deca, on the other hand, is commonly used to improve recovery and joint health, and also helps with weight gain, although it does cause some water retention, so it's important to keep an eye on estrogen and hematocrit levels.