There was once a brilliant inventor
Who created the herb called Aaugmentor
But when his wife ate it
Her body inflated
And suffered a terrible temper
This is a very well-known limerick, after which the inventor tried to change the composition of the plent so that it wouldn't... enlarge people anymore. However it did retain its, um, amplifying capabilities. It's now often used by bartenders to dilute drinks - without actually watering them down! A good brewmaster knows how to make this work with potions too...