A variant in CYP2R1 predicts circulating vitamin D levels after supplementation with high-dose of vitamin D in healthy adolescent girls
J Cell Physiol. 2019 Aug;234(8):13977-13983. doi: 10.1002/jcp.28083
- CYP2R1 gene reduces response to Vitamin D - many studies
- On-line Vitamin D response simulation – July 2021
Genetics category listing contains the following
see also
- Vitamin D Receptor has
530 items - Vitamin D Binding Protein = GC has
177 items - CYP27B1 has
63 items - CYP24A1 in title of 34+ items
- CYP2R1 25+ items
- Calcidiol has
48 items - Calcitriol has
61 items - Topical Vitamin D
- Nanoemulsion Vitamin D may be a substantially better form
- 1289 genes changed with higher doses of Vitamin D - RCT Dec 2019
- CYP3A4 (7 as of Dec 2022)
- Getting Vitamin D into your body
Vitamin D blood test misses a lot
- Vitamin D from coming from tissues (vs blood) was speculated to be 50% in 2014, and by 2017 was speculated to be 90%
- Note: Good blood test results (> 40 ng) does not mean that a good amount of Vitamin D actually gets to cells
- A Vitamin D test in cells rather than blood was feasible (2017 personal communication) Commercially available 2019
- However, test results would vary in each tissue due to multiple genes
- Good clues that Vitamin D is being restricted from getting to the cells
1) A vitamin D-related health problem runs in the family
especially if it is one of 51+ diseases related to Vitamin D Receptor
2) Slightly increasing Vitamin D shows benefits (even if conventional Vitamin D test shows an increase)
3) DNA and VDR tests - 120 to 200 dollars $100 to $250
4) PTH bottoms out ( shows that parathyroid cells are getting Vitamin d)
Genes are good, have enough Magnesium, etc.
5) Back Pain
probably want at least 2 clues before taking adding vitamin D, Omega-3, Magnesium, Resveratrol, etc- The founder of VitaminDWiki took action with clues #3&5
Download the PDF from VitaminDWiki
Aim: The determinants of serum vitamin D seems to be the environmental factors (dietary and supplementary intake and exposure to ultraviolet light) and genetic factors. We aimed to study the relationship between a vitamin D-associated genetic polymorphism and serum 25(OH)D concentrations in healthy adolescent girls in Iran, and its effects on a high-dose supplement of vitamin D.
Material and method: A total of 616 healthy adolescent girls with mean age 15 received 50,000 IU of vitamin D3 weekly over 9 weeks. Serum vitamin D levels and other metabolic factors were measured at baseline and after the intervention. The genotyping of the CYP2R1 variant (rs10741657) was performed by TaqMan genotyping assays.
Results: Regardless of the genetic background, at baseline, 87% of adolescent girls were vitamin D deficient (serum 25(OH)D level < 50 nmol/l). High-dose supplementation with VitD reduced the proportion of girls who were deficient substantially to about 24%. The genetic analysis revealed that although at baseline there was not a gene-vitamin D association (p trend = 0.1), the response to supplementation appeared to be modulated by this variant (p trend < 0.001). However, other anthropometric and biochemical measures were not affected by this intervention, over this short period. Serum 25(OH)D was increased in all participants although the carriers of the minor A allele seemed to be better responders so that the percentages of the change serum vitamin D in the holder of AA and AG genotypes were 539.4 ±443.1 and 443.7 ±384.6, respectively, compared with those with common GG genotype (363.3 ± 354.0). Our regression analysis revealed that the probability of an increase in serum 25(OH)D in a participant with AA genotype was 2.5-fold greater than those with a GG genotype (OR = 2.5 (1.4-4.4); p value = 0.002).
Conclusion: Based on our findings, it appears that the rs10741657 variant of the CYP2R1 gene modulates the response to high-dose of vitamin D supplementation.
Poor CYP2R1 gene reduces blood response to Vitamin D supplementation – Aug 2019Printer Friendly Follow this page for updates5998 visitors, last modified 10 Feb, 2023, This page is in the following categories (# of items in each category)Attached files
ID Name Uploaded Size Downloads 12375 CYP2R1 Response.jpg admin 20 Jul, 2019 87.82 Kb 501 12374 Response vs CYP.jpg admin 20 Jul, 2019 33.29 Kb 489 12373 CYP2R1 alters response.pdf admin 20 Jul, 2019 303.30 Kb 503 - Vitamin D Binding Protein = GC has