What is true for the injectable version, is in most cases also true for the tabs. There are, however, two noticable differences between the two forms of administration. With the use of the injectable version, there is a higher Nitrogen Retention when equal doses are administered. It would seem that on a milligram for milligram basis, users have reported that oral form of Stanozolol was more potent than the injectable for building muscle. This could be due to winstrol ability to decrease SHBG (Sex Hormone Binding Globulin) levels and also increase IGF (Insulin-Like Growth Factor) above those which have been experienced with the injectable version.