London, Feb 20: ''Winners Never Quit'' is the motto emblazoned above mirrors in the bodybuilders' gym, a series of small rooms filled with rubber mats, heavy lifting equipment and sweaty bodies pumping iron. However, complete dedication to be a winner can take you only so far, the London gym's trainer says. Anyone wanting to go beyond their body's ''genetic potential'' will need to take steroids. ''We're supposed to think steroids are dangerous but if that's true - how come all these professionals use them?'' said the trainer, who asked to be identified only as Jonny. Steroids are banned in most professional sports but they are the bread and butter of bodybuilding. Steroid use is linked with aggression, acne, headaches and liver and kidney damage, yet this does not seem to worry men and women yearning for the ''perfect'' body. ''I want to keep putting on muscle, and it's just not possible without steroids. I mean, look at those guys,'' Jonny said, nodding towards photos of champion bodybuilders grinning tightly and flexing impossible muscles. What is worrying medical experts is that steroid use is no longer confined to aspiring Arnold Schwarzeneggers. Youngsters are increasingly turning to the drugs to increase bulk and pump up their self-esteem. Linda Johnstone, co-ordinator at one of the country's few health clinics for steroid users in Liverpool, said that in the last five years there had been a huge increase in the number of young men using their service. ''For older users, it's about performance. The younger users just want to look good. They want a six-pack (stomach) and good pecks (pectorals), and they want it now,'' she said. ''It's not about being huge,'' said one 20-year-old user. ''You want to look your best. How else will you impress the ladies?'' ''It's the individual's choice whether to take steroids,'' Jonny said. ''Most people don't even realise what it's about. It's more dangerous when there's a lack of knowledge about them.'' he says his own knowledge comes from talking with other users and swapping books and articles. Bureau Report