How do I know if Durable D3 COMPLEX is working?Updated 17 days ago

The only way to ensure this formula is working for you is to have your vitamin D levels checked through a simple blood test. Dr. Passero recommends taking it for 90 days before doing blood work.

Vitamin D testing can be done through your doctor, or you can order direct to consumer lab testing through Durable: https://livedurable.com/collections/lab-tests