Water memory is the claimed ability of water to retain a "memory" of substances previously dissolved in it to arbitrary dilution. No scientific evidence supports this claim. Shaking the water at each stage of a serial dilution is claimed to be necessary for an effect to occur. The concept was proposed by Jacques Benveniste to explain the purported therapeutic powers of homeopathic remedies, which are prepared by diluting solutions to such a high degree that not even a single molecule of the original substance remains in most final preparations. Benveniste sought to prove this basic tenet of homeopathy by conducting an experiment to be published "independently of homeopathic interests" in a major journal. While some studies, including Benveniste's, have reported such an effect, other re tests of the experiments involved have failed to reproduce the result. The concept is not consistent with accepted scientific laws and is not accepted by the scientific community. Liquid water does not maintain ordered networks of molecules for longer times than a small fraction of a nanosecond. These research teams reported that solutes subjected to sequential physical processing and dilution show biological effects different from those apparent using just the water employed for the dilutions. The subject has drawn a lot of controversy with many scientists simply rejecting it outright without studying the evidence Although there is much support for water showing properties that depend on its prior processing (that is, water having a memory effect), the experimental evidence indicates that such changes are due primarily to solute and surface changes occurring during this processing. The experimentally corroborated memory phenomena cannot be taken as supporting the basic tenets of homeopathy although they can explain some effects he central principle of homeopathy is that like cures like. So homeopaths seek out dangerous herbs and other ingredients that produce...
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