It cannot be stressed enough the importance of obtaining certain blood test results prior to commencing steroids. These personal baseline readings serve multiple purposes. Firstly, they can prove vital in uncovering any underlying medical issues that may not be already known. Should this be the case, it will determine whether the individual feels that they should avoid steroids completely, or delay use until such time where it appears health is optimal. Also, as many facets of blood readings can be affected by steroids, it is vital that you have pre-steroid use values so that comparisons can be made to baseline, which will provide a valuable insight into how 'recovery' is progressing.