Panax ginseng in a Spagyric preparation. Growing in the shaded mountainous regions of China, Korea and Russia, the ginseng or 'all healing manroot'; is a tonic for men, boosting testosterone, working as a subtle aphrodisiac and reducing or eradicating erectile dysfunction. Panax ginseng is also used for improving memory and cognitive function, increasing energy and athletic performance, to lower blood sugar, reduce stress, regulate mood and strengthen the immune system.