Mercury's toxic properties have been apparent for centuries. Nonetheless, from the time of the first
Emperor of China on, doctors have been fascinated with the metal's purported curative properties. In the 19th and early 20th centuries, health practitioners blithely used mercury as a medical treatment for everything from
syphilis to
teething discomfort to
dysentery.
As early as the 1820s, some healers began to object to the practice of "
giving poison as medicine," but, in many branches of medicine, physicians remained enthusiastic. In the late 1890s, for example, the prestigious scientific journal
The Lancet published case studies broadcasting doctors' seemingly successful use of mercury for the treatment of heart disease. Referring to a mercurous chloride compound called calomel (also called the "
blue pill"), Dr. Arthur Foxwell in Birmingham praised, in September 1895, mercury's "unique" virtues as a cardiac tonic capable of "freeing" a sluggish heart of "half its labour."
Over a century later, the medical perspective on mercury and heart disease has come to look quite different.
Although many researchers have focused heavily on mercury's neurotoxicity in children, others acknowledge that, in adults, the cardiovascular system may be exquisitely vulnerable to mercury's toxic effects. A simple search using the terms "mercury" and "heart disease" in PubMed (the National Institutes of Health database) pulls up ample documentation detailing a
higher prevalence of cardiovascular disease in individuals who have higher blood levels of mercury.
Mercury damages the cardiovascular system even at low concentrations of exposure.
Comment: For more on the ongoing CBD oil battle in the US, see:
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