As is discussed in "The Value of Organic, Plant-Derived Minerals" (Issue #205), when positively charged minerals are absorbed by plants, their bioelectrical polarity is changed to a negative charge. Whenever normally toxic minerals, such as iodine, are absorbed and transformed by plants, they become non-toxic. It may be the chelation factor that accounts for the ability of fulvic acid to neutralize the toxicity of heavy metals such as lead. The actual mechanism that fulvic acid uses to chelate minerals has yet to be ascertained. Although we know that this neutralization happens, the mechanics of the process are still one of nature's secrets - a secret that we benefit from.