The gains made by athletes in uncontrolled observations have been much more impressive. Weight gains of thirty or forty pounds, coupled with thirty percent increases in strength, are not unusual. Such case studies lack credibility because of the absence of scientific controls. However, it would be foolish to completely disregard such observations because the "subjects" have been highly trained and motivated see the articles on pharmacology of sport and sports medicine in the countries of the former Soviet Union for more information on anabolic steroids.
The benefits of ashwagandha are not limited to reduced stress levels. Several studies have also found out that on infertile subjects, ashwagandha is very effective at restoring poor sperm quality, while also boosting lagging testosterone production ( study , study , study ). One particularly interesting study that came out at the end of 2015, had 57 young and perfectly healthy men as test subjects. The guys consumed 300mg’s of KSM-66 ashwagandha on a daily basis for 8 weeks, and on average their T-levels increased from 630 ng/dL to 726 ng/dL .