Bronze-level article


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Against allopathy
Alternative medicine
Clinically unproven

Potentization (also known as succussion) is the term homeopaths use to describe the series of stepwise dilutions used in preparing their medications. A potentization involves taking a portion of a mixture and diluting it in a volume of clean solvent, usually water in a ratio of 1:100 ("2X" or "1C"), and then striking the container 10 times against an elastic object. They do this because, obviously, just diluting the stuff to make a medicine is just plain silly.

The whacking bit is called succussion, a term that originally meant "shaking" as used in chemistry and alchemy. Its use today is almost entirely with respect to homeopathy, although the term is occasionally used in reference to the sound of splashing fluid in a body cavity.[1] Impressive science-sounding terms are known to increase the placebo effect by making the treatment appear more complex and more effective, and this applies equally to homeopathy as well as all alternative medicines, and real medicines. There is a strong lack of evidence to suggest that any of the proposed steps used in potentization actually do anything to the solvent at all, and so there is no discernible difference between merely "diluted" homepathic solutions and properly "potentised" ones.

The potentization scale[edit]

X Scale C Scale Ratio Note
1X 1:10 described as low potency
2X 1C 1:100 Called higher potency than 1X by homeopaths
4X 2C 10−4 Nyloxin (cobra venom) dilution
6X 3C 10−6
8X 4C 10−8 Allowable concentration of arsenic in U.S. drinking water[2]
12X 6C 10−12
24X 12C 10−24 Has a 60% probability of containing one molecule of original material if one mole of the original substance was used.
26X 13C 10−26 If pure water was used as the diluent, no molecules of the original solution remain in the solution if it results in 1 mole of liquid after dilution.
60X 30C 10−60 Dilution advocated by Hahnemann for most purposes: on average, this would require giving two billion doses per second to six billion people for 4 billion years to deliver a single molecule of the original material to any patient.
400X 200C 10−400 Dilution of popular homeopathic flu preparation Oscillococcinum
Note: the "X scale" is also called "D scale". 1X = 1D, 2X = 2D, etc.

Whacking it[edit]

Shaking and agitating the mixture is an important part of the potentization process. Samuel Hahnemann believed that this was a key part of the homeopathic practice and that it would "release dynamic forces from the diluents which were preserved and intensified with subsequent dilutions".[3] In modern homeopathy, it is this process that is said to impart water memory upon the solvent.

In Hahnemann's original work, he had a leather bound board which he used to strike the solutions against. In mass produced homeopathic remedies, the potentization is performed mechanically. What constitutes succussion, however, is poorly defined. The number of "strikes" varies wildly between 10 and 50 and the actual methodology is not consistent, varying between striking it against a board, tapping it, or shaking it.[4] In order for the succussion process to be meaningful, it must be consistent; otherwise skeptical ideas regarding sewage imparting a memory on water still hold, as the treatment plant could easily be performing a potentiating "succussion" on the water. Modern homeopathy holds that succussion gives the water the "energy" it needs, but again, the quantity of energy is undefined, as are questions about whether this energy could be supplied through other means. Bach flower remedies, for example, use sunlight as their "potentiating energy source", similar to that old recipe for a martini that involves passing a sunbeam through a bottle of vermouth.[note 1]


The fact that potentization involves shaking means that many amateur skeptic views on homeopathy are actually straw man arguments. What needs to be proven is not that there is no active ingredient, which is easy and not denied by modern homeopaths, but that succussion does not impart water memory or potentate the remedy. This is easy to demonstrate, but the wide variety of succussion techniques lead to many chances to move the goalposts or potential escape hatches for homeopaths.

Possible "explanations"[edit]

A good spanking makes sure they will remember.

Given the above poor definitions, it is possible that succussion acts to aerate the mixture, thus changing its properties. However, if this were the case, it would be possible to tell the difference between homeopathic solutions and normal water by looking at the concentration of dissolved gases. These differences have not been observed, despite thorough testing. And even if they were, the dissolved gases would return to equilibrium. This is exactly what happens to a carbonated soft drink that goes "flat" when removed from its pressurized container and can happen on a timescale of minutes to hours. Meanwhile, homeopaths only recommend that mixtures are succussed every few weeks to keep them somehow fresh.

See also[edit]


  1. Could James Bond have been onto something with his insistence on martinis "shaken, not stirred"?