DEAR DR. GOTT:
Recently a reader said he had terrible itching caused by Centrum Silver and glucosamine/chondroitin. I also took both products and had itching.
Several years ago I learned I was allergic to shellfish. After some research I found that glucosamine/chondroitin was made with ground shrimp shells and that this was the cause of my itchy allergic reaction. As soon as the supplement was stopped, the itch stopped. I have never had a problem with the Centrum Silver.
DEAR READER:
Thank you for writing with your experience. This could be the reason some people have reactions to otherwise benign substances. It may not be the case for everyone but it will at least serve as a starting point.
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