Anyone who reads Science-Based Medicine on even a semi-regular basis will know our collective opinion of homeopathy. Basically, at its core, homeopathy is pure quackery.
I don’t care if it’s repetitive to say this yet again because it can’t be emphasized enough times that homeopathy is The One Quackery To Rule Them All. OK, there are others that compete for that title, such as reiki and other magical “energy therapies” like therapeutic touch, both of which, unfortunately, can be found in many academic medical centers where the faculty really should know better. Any “medicine” whose very precepts break multiple laws of physics and chemistry, laws that would have to be proven not just wrong but spectacularly wrong for homeopathy to work, deserves only ridicule.
The “laws” of homeopathy
Think of it this way. There are two “laws” of homeopathy, neither of which has any basis in reality. First, there is the law that states “like cures like” and asserts that, to relieve a symptom, you need to use a substance that causes that same symptom in healthy adults. There is, of course, no evidence that this is a general principle of medicine. For instance, we don’t generally treat fever by administering something that causes fever or treat vomiting with something that causes vomiting. The second law, however, is the one that’s completely ridiculous. Basically, it’s the law of infinitesimals. This law states that a homeopathic remedy is made stronger with dilution, specifically serial dilutions with vigorous shaking between each dilution step to “potentize” the remedy. That’s ridiculous enough, but homeopaths, never satisfied with the merely ridiculous have to turn the ridiculous up to 11 and beyond by using this principle to assert that dilutions far beyond the point where there is likely even to be a single molecule of the original remedy left are effective and become more so with more dilution. For instance, a 30C dilution is 30 one hundred-fold dilutions (C=100, get it?), or a 1060 dilution. Avogadro’s number is only on the order of 6 x 1023, or more than 1036-fold less than the dilution. The simple mathematics of homeopathy just doesn’t work, although this doesn’t stop homeopaths from coming up with some truly spectacular flights of pseudoscience (like the “memory of water”) to try to “explain” how it can work.