ConsumerLabVitamin D

More quality control problems with Vitamin D has reported problems with 29% of the vitamin D supplements selected for testing and review.

Here’s what we know.

  • Vitamin D plays a critical role in bone health, and higher blood levels are associated with reduced risk of heart attack and diseases including depression, rheumatoid arthritis, and asthma.

Among 49 products tested, here are some of the problems in supplements containing vitamin D.

  • 2 supplements with vitamin D in combination with calcium and vitamin K were contaminated with lead
  • 1 gummy supplement for children contained 251% of the listed amount of vitamin D
  • 1 gummy for adults contained only 32% of the listed amount of vitamin D
  • 1 liquid supplement provided only 44% of the listed amount of vitamin D
  • 1 tablet contained only 83% of the listed amount of vitamin D
  • 1 vitamin D/vitamin K combination supplement provided only 74% of its vitamin K

The bottom line?

It’s an all too familiar story for herbals and nutritional supplements. Click the ConsumerLab link on the right sidebar for more summaries of studies.

You must join to get the full test results and quality ratings for vitamin D supplements.

7/2/11 21:27 JR

Hi, I’m JR

John Russo, Jr., PharmD, is president of The MedCom Resource, Inc. Previously, he was senior vice president of medical communications at, a complementary and alternative medicine website.