Levels of Steroid Use:
There are three different levels of steroid use:
• Beginner: This is for the novice with little to no previous steroid use.
• Intermediary: Users who have used anabolic steroids in the past and are seeking greater results.
• Advanced: Users who frequently use anabolic steroids and wish to see maximum results.
It is important that users begin with the lowest level possible when beginning a new substance or when stacking new substances together. This will allow the user time to determine how the body will react without maximum side effects.
Heavy consumption of the essential amino acid lysine (as indicated in the treatment of cold sores) has allegedly shown false positives in some and was cited by American shotputter C. J. Hunter as the reason for his positive test, though in 2004 he admitted to a federal grand jury that he had injected nandrolone.  A possible cause of incorrect urine test results is the presence of metabolites from other AAS, though modern urinalysis can usually determine the exact AAS used by analyzing the ratio of the two remaining nandrolone metabolites. As a result of the numerous overturned verdicts, the testing procedure was reviewed by UK Sport . On October 5, 2007, three-time Olympic gold medalist for track and field Marion Jones admitted to use of the drug, and was sentenced to six months in jail for lying to a federal grand jury in 2000. 
How do you protect yourself against this? Well, when taking Deca Durabolin you can also take ant-estrogen medications to counter the results. Things like Nolvadex and Arimidex are popular choices. Both approach limiting the effects of estrogen different and will have different side effects on your health worth considering. Even with side effects though it is still worth pursuing either of these options. Gynecomastia is a particularly big problem due to how the imbalance between estrogen and progesterone is what leads to gynecomastia. So, by keeping your hormone levels regulated, you reduce the risk of potential unwanted growth.