Gotta plays devils advocate again here. She broke the rules, she deserves her year suspension and the fine. But again stanozolol is not primarily a muscle building steroid. It is used primarily to shed non-lean body mass (as a form of diuretic basically), or can heal injuries quicker, the third use is obviously to be the final stage of a roid stacking cycle. All are possible But I could see it being put in a supplement as it's a great way to shed weight without losing the muscle you "already" have. It's not a "build muscle" steroid; even though it can/does build, you can find better options for that on the shelf at your local GNC.
In fact stanzolol (Winstrol) was in brand name products in your local supplement shop as recently as 5-6 years ago listed as Prostanozol. Prostanozol just happened to be inactive when administered and then metabolize in your body, being a prodrug of stanzolol. There are still things on your supplements shelf that will eventually be on the ban list. It's not an exact science.
Her explanation is perfectly reasonable for the form of steroid it was and there's no way we'll know; things like stanozolol ARE put in supplements to shed weight, and aren't always listed if it was a mixed supplement, rather than a brand name one, from someone they trusted. Innocent til proven guilty. She's guilty of taking it, but unless we hear otherwise, its probable she's innocent of knowing about it. It'd be good for any users to educate themselves on what steroids encompass, you'd learn a lot
There are endogenous anabolic steroids, basically designer drugs, out there right now that can beat the drug tests. There are some with 24 hour detection periods or less such as Salibutamol for fat-burning. It's on the banned steroids list as a beta-2 agonist proven to increase performance. It's out of you in 24 hours max. And there will always be new designer steroids coming out monthly to beat the system by modifying the chemical structure of existing known steroids being tested for and/or coming up with an entirely new chemical structure that produces a similiar, the same, or better result than a known, banned, tested for steroid. Doping will never end in performance sports for those that have their hopes up.