To keep the nervous system andTesterect brain at top levels when doing these types of tasks, one should choose a vitamin B complex. It will also support the immune system, which may be necessary if exercise is at a minimum. There is also the added stress relief factor with a vitamin B complex, which may be important in a high profile work situation. Actually, can't nearly every lifestyle afford stress relief is today's fast-moving world?If a person isn't able to get regular exercise, they aren't producing endorphins, which stimulate the production of serotonin.