[Omeo33] Art 1011 - eCAM, 2009, doi: 10.1093/ecam/nep036

[Gino Santini]

Homeopathic Preparations of Quartz, Sulfur and Copper Sulfate Assessed  
by UV-Spectroscopy
Ursula Wolf, Martin Wolf, Peter Heusser, André Thurneysen and Stephan  
Baumgartner

Homeopathic preparations are used in homeopathy and anthroposophic  
medicine. Although there is evidence of effectiveness in several  
clinical studies, including double-blinded randomized controlled  
trials, their nature and mode of action could not be explained with  
current scientific approaches yet. Several physical methods have  
already been applied to investigate homeopathic preparations but it is  
yet unclear which methods are best suited to identify characteristic  
physicochemical properties of homeopathic preparations. The aim of  
this study was to investigate homeopathic preparations with UV- 
spectroscopy. In a blinded, randomized, controlled experiment  
homeopathic preparations of copper sulfate (CuSO4; 11c–30c), quartz  
(SiO2; 10c–30c, i.e. centesimal dilution steps) and sulfur (S; 11x– 
30x, i.e. decimal dilution steps) and controls (one-time succussed  
diluent) were investigated using UV-spectroscopy and tested for  
contamination by inductively coupled plasma mass spectrometry (ICP- 
MS). The UV transmission for homeopathic preparations of CuSO4  
preparations was significantly lower than in controls. The  
transmission seemed to be also lower for both SiO2 and S, but not  
significant. The mean effect size (95% confidence interval) was  
similar for the homeopathic preparations: CuSO4 (pooled data) 0.0544%  
(0.0260–0.0827%), SiO2 0.0323% (–0.0064% to 0.0710%) and S 0.0281% (– 
0.0520% to 0.1082%). UV transmission values of homeopathic  
preparations had a significantly higher variability compared to  
controls. In none of the samples the concentration of any element  
analyzed by ICP-MS exceeded 100 ppb. Lower transmission of UV light  
may indicate that homeopathic preparations are less structured or more  
dynamic than their succussed pure solvent.

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