you can get the preground antlers at any traditional Chinese medicinal shop they also like to eat tiger penis and rhinoceros horns for the same purpose. the deer antlers are usually from farmed deer in new zealand, but the tiger penis and rhino horn will be harder to find as a tourist since they are endangered species. if you find a resturant that serves traditional chineese medical food, you might also find shit like monkey, hippo, giraffe, elephant, all sorts of crazy meat that someone with a concern for the planet should never eat. you should try some bird's nest soup. yes, they use the NEST. the bird spit that holds the nest together turns into a gelatin-like consistency and gives the soup the taste. it's really expensive and fucking disgusting. try some sea horses, some dried gecko, earthworms, sea cucumber...did i mention that cats, dogs, and rats are eaten all over southern china? name anything that you can put in your mouth that wont kill you, the chinese will find that through some convoluted reasoning that it is beneficial to your health and they eat it en masse.