What to do if my vitamin D is 16: A Guide to Boosting Your Levels
                                
                                
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                                    4 min read                                
                            
                                According to a national survey, a significant portion of the U.S. population has inadequate vitamin D levels. If your blood test shows your vitamin D is 16 ng/mL, you are in the insufficient range, and it is crucial to take proactive steps to raise it.