From the fitting, we have observed that three major peaks are present. The first peak, at ~456 nm, is associated with silica NPs. The peak is absent in samples processed in plastic bottles; the details are described in supporting information (Figure ). The other two peaks originate due to the localized surface plasmon resonance (SPR) of Au NPs. The narrowing of the absorption peaks in the absorption spectra (Figure C. the ratio of Au/sugar increases as an effect of homeopathic potentization.