Testosterone Enanthate is very popular like Testosterone Propionate , and its esters are longer than propionate and have a half-life of about 15 days without frequent injections, especially when used in hormone therapy. Most athletes chose amount injected twice a week, and more frequent, more and more economic bodybuilders injection, every other day while in terms of heptanoic acid testosterone long half-life to do so is not necessary, but these athletes said the blood drug concentration is more stable, high levels of testosterone is better.