I don't think age is sufficient reason to accord respect to an alleged remedy or theory. If something has been used as a medication for thousands of years and hasn't managed, over that time, to produce a scrap of decent quality evidence that it treats or prevents a real illness, as is the case for virtually all the alternativist theories and products (although many are in fact "New Age" in the sense of having been "invented", along with an impressive-sounding "tradition", by the multinational conglomerates which happen to have a toe in this lucrative market), then it should be allowed to fizzle out with its dignity intact.
Nor do I accept the suggestion that the fact that many people use these things (although in surveys it's not the majority - more like 25%) validates them. Most people without a science GCSE to their name, if asked, instinctively "know" that echinacea and vitamin C will cure a cold - just as they "know" that the MMR will make your child autistic and depleted uranium will give you cancer and sitting on cold doorsteps or warm radiators will give you piles.
Nor do we always know what is in these alternative "remedies". You can probably be confident that what you buy in Boots or Holland and Barrett is what the label says it is - but a recent study in a local hospital showed that over 9 out of 10 "herbal" preparations sold for childhood eczema in the "traditional Chinese medicine" shops that are springing up all over Birmingham contained potent steroids - the very stuff parents thought they were AVOIDING by buying the little unlabelled pots from the TCM "doctor".
Nor is "natural" always safer. Kerala and bush tea will probably reduce your blood sugar if you have diabetes, and lots of my patients use them because the next door neighbour's budgerigar's granny is always a more credible source of medical information than a mere doctor, but they'll destroy your liver very effectively too.