Nelson Vergel
Founder, ExcelMale.com
Here are the results of a survey I performed a few months ago. 345 men answered and shared their experiences:
https://www.surveymonkey.com/results/SM-LL72YQFM/
If you want to participate, you still have time: https://www.surveymonkey.com/r/testosterone
Download PDF attached (registered members only)