This is from Ben Goldacres blog, bad science. I think it nicely sums up why homeopathic medicine is not worth bothering with.
It doesn’t all add up …
The ‘science’ behind homeopathy
Homeopathic remedies are made by taking an ingredient, such as arsenic, and diluting it down so far that there is not a single molecule left in the dose that you get. The ingredients are selected on the basis of like cures like, so that a substance that causes sweating at normal doses, for example, would be used to treat sweating.
Many people confuse homeopathy with herbalism and do not realise just how far homeopathic remedies are diluted. The typical dilution is called “30C”: this means that the original substance has been diluted by 1 drop in 100, 30 times. On the Society of Homeopaths site, in their “What is homeopathy?” section, they say that “30C contains less than 1 part per million of the original substance.”
This is an understatement: a 30C homeopathic preparation is a dilution of 1 in 10030, or rather 1 in 1060, which means a 1 followed by 60 zeroes, or – let’s be absolutely clear – a dilution of 1 in 1,000,000,000,000,000,000, 000,000,000,000,000,000,000,000,000, 000,000,000,000,000.
To phrase that in the Society of Homeopaths’ terms, we should say: “30C contains less than one part per million million million million million million million million million million of the original substance.”
At a homeopathic dilution of 100C, which they sell routinely, and which homeopaths claim is even more powerful than 30C, the treating substance is diluted by more than the total number of atoms in the universe!
www.badscience.net/2007/11/a-kind-of-magic/ scroll right down to the bottom.