just thinking
If you're using
Iodine in some form, the result simply reflects that. The range usually reflects the mineral level that most people who are tested have. If no one taking
Iodine gets tested, then the range for
Iodine will be quite low. Someone taking iodine who then gets tested after the range is set will look like they're overdosing iodine. This problem also exists for blood test result ranges.