no not for the guys that took part in that study. the drug was likely pulled, then were given no PCT and no TRT, and they likely crashed and lost weight. in order for those gains to be more permanent they would of needed to be 'actualized' over a period of time.
people often forget that LBM , lean body mass, gains account for both an increase in muscle tissue itself plus and increase in inter cellular water retention. . the inter cellular water retention that came from taking the Ment would have been 'actualized' into permanent gains had they stayed on the MENT or some other AAS over longer periods of time so that the 'infrastructure' could have been established to keep those gains.
see this for more details on what that means
https://forums.steroid.com/anabolic-...pensation.html