Dr. Holick, the Boston University endocrinologist, who perhaps more than anyone else is responsible for creating a billion-dollar vitamin D sales and testing juggernaut, elevates his own levels of the stuff with supplements and fortified milk. When he bikes outdoors, he won’t put sunscreen on his limbs.
A number of insurers and health experts have begun to view widespread vitamin D testing as unnecessary and expensive. In 2014, the United States Preventive Services Task Force said there wasn’t enough evidence to recommend for or against routine vitamin D screening.
Dr. Holick also has extensive financial ties to the pharmaceutical industry. He received nearly $163,000 from 2013 to 2017 from pharmaceutical companies for consulting and other services.