However, users aged between 35 and 54 are significantly more likely than those aged 18-34 to say pain relief is among the main reasons they have used steroids or other sports supplements.
But there is hardly any difference in gender, with 9% of men admitted taking steroids, compared with 8% of women.
And 71% of all those polled said they would not know where to get hold of anabolic steroids.
Using steroids for image reasons is a "worrying" problem among young people in Wales, according to the nation's social services and public health minister Rebecca Evans, who said in January: "It's not just a problem in sport - it is a wider societal issue.