Are mutations in your genes for the vitamin D receptor impacting your vitamin D requirements?
There are three common genetic variants, known as Taq1, Bsm1, and Fok1. They’ve been associated with the risk of certain diseases but no one has quite sorted out what they are actually doing. It’s possible they raise your need for vitamin D. Watch this video for my recommendations on what to do if you have them.
I recommend testing your VDR genes with StrateGene, which you can get here:
For more information on how to get the StrateGene report, watch this video:
You may also enjoy these other two videos I made about vitamin D testing: