Its possible to sensitive to a constituent in the Vitamin pills (and not the Vitamin) such as a preservative. Iodine is unlikely to be a problem as your body needs Iodine to function normally. If your partner eats a normal healthy balanced diet, and does not drink alcohol excessively, at 67 years old, he does not need Vitamins in any event. Humans have become far too dependent on taking unnecessary vitamin tablets and supplements that may contain colorants, additives and any number of unnecessary chemicals.
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