Unlike the western mind set and philosophy, the asian one has a 180 degree opposite view. they use herbs as TONICS. You take low doses daily and it slowly builds your body up over time. Taking a single dose of any of the above herbs or even 2-3 doses will not really do anything. taking a dose daily for a few weeks will. The western mindset wants drugs that act immediately and views very slow acting ones as useless. The eastern mindset views drugs that act immediately as posions and slow acting ones as gifts from nature.