I have been using Cordyceps for well over 2 years now. The original product I used was quite expense and just became too rich for my blood. Therefore I've switched over to the Paradise brand. I was very happy to find that I benefit on the same level using the Paradise brand as I was with the more expensive product. I notice a significant difference in my endurance and strength during my workout routines when I take cordyceps. My workout routine is vigorous, I run over 6 miles 3xweek and do a hardcore routine of weight resistance and compound exercises that lasts for 75min the other 3 days a week, taking 1 day off for rest. The key to continuously benefit from taking cordyceps, is to take them for 2 months on 2 weeks off. Continue taking them on this schedule and I believe you will always feel the difference. At least I do.