Implants aside, silicon is no stranger to the body.
Randall
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D000818:Animals; D005260:Female; D006801:Humans; D016462:Mammaplasty / Q000009:adverse effects; D019736:Prostheses and Implants / Q000009:adverse effects*; D012825:Silicon / Q000032:analysis*; D012828:Silicones / Q000009:adverse effects*; D014881:Water Supply / Q000032:analysis
D012828:Silicones; D012825:Silicon