In Gothenburg's waste treatment plant, Rickard discovered a silver lining in the cloudy waters.

BBC: Smelly socks raise silver stink

Perhaps someday colloidal silver will be widely accepted along with other nontraditional methods of treatment once considered quackery, such as acupuncture.

FORBES: What's Next?

Julie Silver, an assistant professor at Harvard Medical School and expert in rehabilitation medicine, developed STAR after her own treatment for breast cancer, which she says left her too sick to care for her family or return to work.

WSJ: Rehab for Cancer Survivors