Steroids are illegal without a prescription in the United States. They can, however, be imported illegally or created in illegal labs. More recently, "designer steroids" have been produced that are difficult to detect with standard testing procedures. Sometimes veterinary steroids are abused, as well, because they are cheaper and easier to get. A few of the more commonly used oral and injectable anabolic steroids are listed below
| Oral | Injectable |
| Anadrol | Boldenone |
| Danazol | Dihydrotestosterone |
| Dianabol | Nortestosterone |
| Winstrol | Testosterone |
Although previous research focused specifically on anabolic steroids, several other hormone-like substances have been found in supplements, but not listed on their labels.
- Previously certain substances that were sold as "dietary supplements" turned into anabolic steroids in the body. These supplements, known as "precursors," include androstenedione (a testosterone precursor). Because of an October 2004 law, the sale of most of these substances was banned in the United States.
- However, one one precursor, dehydroepiandrosterone (DHEA) can turn into androstenedione and testosterone, and is legally sold. DHEA can result in masculine traits when it is converted into androstenedione and testosterone.
- Creatine is not a hormone. Instead, it is a combination of three amino acids. Amino acids are the building blocks of protein that occurs naturally in the body. Creatine is contained in meats and is eliminated in the urine. When taken as a dietary supplement, it is believed to boost energy recovery, although some studies do not confirm this effect. In one study by the Mayo Clinic, more than 8 percent of 328 high school athletes reportedly used creatine. Muscle cramps and nausea are side effects. There have been no medically useful studies of long-term effects, and no studies have involved children or adolescents.
- Amphetamines ("speed"), ephedrine (Ma Huang), and pseudoephedrine (Sudafed®) also are being abused. These three substances are related to the natural hormone epinephrine, which is adrenalin. These drugs keep people from sleeping when they are tired, creating a sense of energy and well-being. Ephedrine was often used as a weight loss supplement. Abusing these drugs - especially using large quantities - harms the brain, as well as the nervous and cardiovascular systems. In a review of dietary supplements conducted by the CDC, ephedrine products made up less than 1 percent of the sales of dietary supplement. They were responsible, however, for a stunning 64 percent of all serious side effects of supplements reported to the Center.
In February, 2004, ephedrine products were removed from supplement shelves in the United States because of their link to at least 100 deaths, heart attacks, and strokes. Today other stimulants have taken the place of ephedrine, including "Bitter Orange" also known as Citrus aurantium, which contains the stimulant synephrine and the drug theobromine. It's important to know that drugs marketed as being "ephedra free" are not stimulant free and may have significant risks, including the risk of high blood pressure and stroke.
