The best way to identify fakes is to compare it to the original, however, most athletes have never seen the original, therefore it is hard to compare. The most popular drugs such as Deca-durabolin, winstrol, and injectable testosterone have the most fakes as well so be especially aware when trying to identify them.
The best way to identify fakes yourself, is to take a long good look at the packaging. Like I said, counterfeiters are looking to make big money fast, therefore, they do not put a lot of time and effort into making their product look the best it can. The packaging on fakes usually looks a lot like the original, but look at the expiration date and the batch number. If they look like they were all printed in the same process as the label, then they are most definitely fakes.
Be sure that the expiration date on the box matches the one on the product as well. Real pharmaceuticals are packaged in large quantities and the batch number and the expiration date are imprinted later in a different process. Also, often times the labels are of low quality as well. You should not be able to easily peal the label off of the ampule or the bottle. Most steroids made by legitimate companies use labels with rounded corners so pay attention to that as well. Also be sure to check that it is on straight and that it doesn’t overlap itself, this is a sure sign of low quality.
If you are checking a glass ampule, be sure that if you have a few, they are filled consistently, and of the same color. If it doesn’t have a label, be sure that its imprint is straight and level and cannot be smeared easily. Be especially aware of multi-injection vials, these are easily obtained by counterfeiters and are not easily available as a legit drug. A person should beware of all drugs available on the black market, not just steroids.