1-3 grams of L-cysteine 60 minutes before
game time
500 mg of horny goat weed extract 30-60
minutes before
Source:
"Rotten eggs & erections. " Joe Weider's Muscle & Fitness. 71.3 (March 2010): 51(1).
Stoppani, Jim. "The Encyclopedia of Supplements A-F." Flex Dec. 2011: 196+.