Anyone using any supplements that help cycling overall?I used DHEA for about 1.5 weeks... it was winter but I got one ride in and it made me feel strong - but I wasn't sure if it was DHEA or that I haven't ridden in a while. It also gave me really wild dreams. I gave it up after reading its potential side effects. Plus, I thought it was the reason for my breakthrough in running speed. But since I gave it up, I have still been improving my running times.This week, I went on a natural supplement Rhodiola Rosea. I felt good riding today, but then compared my speed vs. last year and it was slower... despite warmer temps than last years comparable ride.Anyone have a supplement that they can swear by?