Testosterone Cypionate (Test Cyp) is another long-acting form of testosterone, similar to Test E, but it is often preferred in the United States due to its availability and slightly longer half-life. Test Cyp works by promoting the production of red blood cells, improving protein synthesis, and stimulating muscle growth. The benefits of Test Cyp include enhanced muscle mass, strength gains, and fat loss. It also helps to increase libido, improve mood, boost energy levels, and contribute to better bone health. Like Test E, it is commonly prescribed for testosterone replacement therapy, helping men with hypogonadism or low testosterone levels.