Winstrol (Stanozolol) is an Anabolic Steroid that was derived from Testosterone in 1962 by Winthrop Labs . The original purpose of this steroid was to help treat people suffering from anemia, it is also often used for veterinary purposes. This high anabolic, low androgenic steroid does not bind to the androgen receptor. For this reason Winstrol is considered a weak steroid in terms of its muscle building properties, it does however cause great increases in strength. Stanozolol is also a popular steroid for females due to its low androgenic properties it makes it a safer choice as side effects such as voice deepening and facial hair are a lower risk when compared to steroids such as Dianabol . This doesn’t mean females should use Winstrol as irreversible masculine side effects are still a risk.