There are different dilutions/potencies. How much a substance is diluted depends upon the desired potency. The higher the potency, the less of the original substance remains. Very high potency remedies are highly diluted. The higher the potency the more deeper-acting the remedy is.
Potency scales
Three main
logarithmic dilution scales are in regular use in homeopathy. Hahnemann created the "centesimal" or "C scale", diluting a substance by a factor of 100 at each stage. There is also a decimal dilution scale (notated as "X" or "D") in which the preparation is diluted by a factor of 10 at each stage.
[8] The centesimal scale was favoured by Hahnemann for most of his life, although in his last ten years Hahnemann developed a quintamillesimal (Q) scale which diluted the drug 1 part in 50,000
[9] The greatest dilution reasonably likely to contain at least one molecule of the original substance is around 12C.
[10]
A 2C dilution requires a substance to be diluted to one part in one hundred, and then some of that diluted solution diluted by a further factor of one hundred. This works out to one part of the original substance in 10,000 parts of the solution.
[11] A 6C dilution repeats this process six times, ending up with the original material diluted by a factor of 100−6=10−12. Higher dilutions follow the same pattern. In homeopathy, a solution that is more dilute is described as having a higher
potency, and more dilute substances are considered by homeopaths to be stronger and deeper-acting.
[12] The end product is often so diluted that it is indistinguishable from the dilutant (typically
ethanol or pure water for liquids,
milk sugar for insoluble solids).
[13][14][15]
Hahnemann advocated 30C dilutions for most purposes (that is, dilution by a factor of 1060).
[16] Hahnemann regularly used dilutions up to 300C but opined that "there must be a limit to the matter".
[17]: 322 A solution that is more dilute is described as having a higher "potency", and more dilute substances are considered by homeopaths to be stronger and deeper-acting.
[18] In Hahnemann's time it was reasonable to assume that preparations could be diluted indefinitely, as the concept of the atom or molecule as the
smallest possible unit of a chemical substance was just beginning to be recognized. We now know that the greatest dilution that is reasonably likely to contain one molecule of the original substance is 12C, if starting from 1 mole of original substance (see
Avogadro constant for justification).
Homeopathic dilutions - Wikipedia