For many, Hollywood actors and bodybuilders among them, anabolic steroids have become a regular part of life.
But with side-effects that range from excess body hair to liver damage, using them can result in serious health issues as well as bigger muscles - as the stars of a new documentary fronted by former reality TV star Jodie Marsh prove.
Among the performance-enhancing drug users to feature on Jodie Marsh On...Steroids, is former barmaid Candice Armstrong, 28, from Walthamstow in London, whose steroid abuse has effectively turned her into a man.
Once a slender, pretty blonde, Candice is now a hulking brunette with muscles that wouldn't look out of place on Arnold Schwarzenegger and body hair that sprouts from her back, chest and upper lip.
Candice had no intention of becoming so masculine when she began taking the drug, but says that it's too late for her to stop.