Some diseases may have "learned' to protect themselves by deactivating the Vitamin D Receptor
Unfortunately, when the disease leaves the body, it fails to re-activate the Vitamin D Receptor
In which case the cells may continue to have low vitamin D levels for months/years
Suspect that is the case for Long-COVID
12+ Vitamin D Receptor pages have DEACTIV.. in the title
This list is automatically updated
5 more studies in VitaminDWiki
Lyme disease and Vitamin D - many studies
Obesity decreases BOTH Vitamin D levels and Vitamin D Receptor activation – Oct 2023
Herpes (Cytomegalovirus) downregulates the vitamin D receptor by 8X – Jan 2017
Breast Cancer reduces receptor and thus blocks Vitamin D to the cells – several studies
Controversial Effects of Vitamin D and Related Genes on Viral Infections, Pathogenesis, and Treatment Outcomes - 2020
Colon Cancer protects itself by changing the VDR and CYP3A4 genes – Dec 2022
VitaminDWiki – The Vitamin D Receptor is associated with many health problems - Lyme is #1