In 1951, Dr. Chemen'kh of the USSR Academy of Science performed an experiment to determine whether ginseng was effective on work efficiency. He measured the speed accuracy of picking up two specific movable types from a mixture of types in each case. Following one hour's work, he administered wild ginseng extract to the 1st group, cultivated Chinese-Korean Panax ginseng extract to the 2nd group, glucose to the 3rd group and alcohol to the last group and compared the accuracy of the work of these four groups before and after the administration. He found that mistakes made by the alcohol fed group increased 46% and the glucose fed group 16% but the Chinese-Korean Panax Korean ginseng administered group was less and the wild ginseng group was the least. Prof. Petkov established that daily doses of ginseng preparations during 15-45 days increase physical endurance and mental capacity for work, as well as industrial activity. The increase in work efficiency was noted not only during the experiment itself but also for a stated period of time (a month and a halt) after the experiment.

Prof. Petkov and Prof. Brekhman have both remarked in their report, that there is a world of difference between ginseng and other stimulants such as caffeine or amphetamine:

- Ginseng is not an excitant. It does not cause feelings of over-excitation, emotional disturbance or agitation.

- There is a sedative component in ginseng. Unlike other stimulants, there is no difficulty in sleeping after taking it.

- Ginseng acts in a stabilizing fashion. The more tired one is, the more noticeable the action.

- Ginseng causes an increase in health, appetite and mental condition, especially if taken over a period. The other stimulants cause more ill health the longer they are taken.

- Ginseng is much safer.

- Ginseng assists in combating stress, while other stimulants can actually cause stress.