18 months or so should take you out of the detection range for some of the longer-lived anabolic substances that are found floating around out there, so if that's what you mean by "not anytime soon" I suppose that's a reasonable wager to make.
Of course, one might also want to think about how comfortable they feel ingesting a category of product with such an incredibly high likelihood of having, well, just about anything in it. There *are* certified clean supplements available, and I honestly can't imagine why anyone who wants to use products in this category doesn't automatically purchase one of those.
Except, of course, for the fact that they may well not work as "well" as the non-certified ones.
The answer as to why that is often the case should be pretty obvious.
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit -
http://source-e.net/ Cyclocross blog -
https://crosssports.net/ BJJ instruction -
https://ballardbjj.com/