1. Melissa Harrison Melissa Harrison United States says:

    I would like to raise the point that this study may demonstrate correlation rather than causation. I supplement with a B complex and vitamin D because of low test results for vitamins B12 and D. I wouldn’t have known of my low levels if I weren’t already being seen by an endocrinologist and gastroenterologist for (multimorbid) chronic conditions.

    • Judy Liu Judy Liu United States says:

      This is 100% correlation. Low vit B12 causes numbness and tingling and muscle aches and pains and vit d deficiency causes SAD in certain people. So what happens when people with muscle aches, tingling, depression look up 'natural' fixes? They just take more vitamins.

      This result is due to correlation, NOT causation. People with more comorbid conditions are more likely to take extra vitamins.

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
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