I am not a fan of alternative medicine, as my recent commentary on a German brain tumor study indicates. On the other hand, some people swear by them. Some people on "watch & wait" for indolent lymphoma credit various supplement regimens with preventing their disease from progressing. On the other hand, the scientific literature is generally lacking on this point, and there are whole blogs largely devoted to slaying the beast of pseudo-medicine. My general take is that, if pharmaceutical corporations really were the greedy, money-hungry beasts their foes think they are (and on that point I generally concur), and there really were substantial benefits to be had from alternative medicines, then said Big Pharma would be on the herbs in question like white on rice. That for conspiracy theories.
Anyhow, having said that, while "approaches" like homeopathy literally can't work according to evidence-based medicine, herbal therapies might work -- it's just that they don't deliver standardized or purified doses, so, theoretically, isolating and mass-producing the active ingredients in pill or solution form will always be more effective. Which is why I do tend to keep an eye open for interesting new research on the subject of "alternative medicine." Like, for instance, a curious study on Devil's Claw I found while searching for information about advanced follicular lymphoma.