Photochem Photobiol Sci. 2017 Jan 31. doi: 10.1039/c6pp00329j. [Epub ahead of print]
Abstract failed to mention additional restrictions due Vitamin D Receptor, lack of co-factors, etc.
- Vitamin D Cofactors in a nutshell
- Reasons for low response to vitamin D
Such as: low Magnesium, low Boron, smoking, soft drinks, Anemia, darker skin, elderly . . .
Genetics category listing contains the following
Vitamin D blood test misses a lot
- Snapshot of the literature by VitaminDWiki - (subject to many future developments)
- Vitamin D from coming from tissues (vs blood) was speculated to be 50% in 2014, andi in 2017 is speculated to be 90%
- Note: Good results from a blood test (> 40 ng) does not mean that a good amount of Vitamin D actually gets to cells
- A Vitamin D test in cells appears feasible (personal communication)
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 show benefits (even if conventional Vitamin D test shows an increase)
3) Vitamin D Receptor test (<$30) scores are difficult to understand in 2016
easier to understand the VDR 23andMe test results analyzed by FoundMyFitness in 2018
4) 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&4
Vitamin D Receptor category has the following
Vitamin D tests cannot detect Vitamin D Receptor (VDR) problems
A poor VDR restricts Vitamin D from getting in the cells
It appears that 30% of the population has a poor VDR (40% of the Obese )
VDR at-home test $29 - results not easily understood in 2016
There are hints that you may have inherited a poor VDR
Compensate for poor VDR by increasing one or more:
|1) Vitamin D supplement|
Sun, Ultraviolet -B
| Vitamin D in the blood |
and thus in the cells
|2) Magnesium||Vitamin D in the blood |
AND in the cells
|3) Omega-3||Vitamin D in the cells|
|4) Resveratrol||Vitamin D Receptor|
|5) Intense exercise||Vitamin D Receptor|
|6) Get prescription for VDR activator|
|Vitamin D Receptor|
|7) Quercetin (flavonoid)||Vitamin D Receptor|
|8) Zinc is in the VDR||Vitamin D Receptor|
|9) Boron||Vitamin D Receptor ?, |
|10) Essential oils e.g. ginger, curcumin||Vitamin D Receptor|
|11) Progesterone||Vitamin D Receptor|
|12) Infrequent high concentration Vitamin D|
Increases the concentration gradient
|Vitamin D in the cells|
Note: If you are not feeling enough benefit from Vitamin D, you might try increasing VDR activation. You might feel the benefit within days of adding one or more of the above
Far healthier and stronger at age 72 due to supplements Includes 6 supplements which help the VDR
- Normal weight Obese (50 ng = 125 nanomole)
Abboud M1, Rybchyn MS2, Rizk R3, Fraser DR4, Mason RS2.
- 1Physiology, School of Medical Sciences, Sydney Medical School, Australia. rebecca.mason at sydney.edu.au and Bosch Institute for Medical Research, Australia and College of Sustainability Sciences and Humanities-Zayed University, Abu Dhabi, United Arab Emirates.
- 2Physiology, School of Medical Sciences, Sydney Medical School, Australia. rebecca.mason at sydney.edu.au and Bosch Institute for Medical Research, Australia.
- 3Department of Health Services Research, CAPHRI School of Public Health and Primary Care, Maastricht University, Maastricht, 6200 MD Maastricht, The Netherlands.
- 4Faculty of Veterinary Science, University of Sydney, Sydney, NSW 2006, Australia.
Studies on the determinants of vitamin D status have tended to concentrate on input - exposure to ultraviolet B radiation and the limited sources in food. Yet, vitamin D status, determined by circulating concentrations of 25-hydroxyvitamin D (25(OH)D), can vary quite markedly in groups of people with apparently similar inputs of vitamin D.
There are small effects of polymorphisms in the genes for key proteins involved in vitamin D production and metabolism, including
- 7-dehydrocholesterol reductase, which converts 7-dehydrocholesterol, the precursor of vitamin D, to cholesterol,
- CYP2R1, the main 25-hydroxylase of vitamin D,
- GC, coding for the vitamin D binding protein which transports 25(OH)D and other metabolites in blood and
- CYP24A1, which 24-hydroxylates both 25(OH)D and the hormone, 1,25-dihydroxyvitamin D.
25(OH)D has a highly variable half-life in blood. There is evidence that the half-life of 25(OH)D is affected by calcium intake and some therapeutic agents.
Fat tissue seems to serve as a sink for the parent vitamin D, which is released mainly when there are reductions in adiposity.
Some evidence is presented to support the proposal that skeletal muscle provides a substantial site of sequestration of 25(OH)D, protecting this metabolite from degradation by the liver, which may help to explain why exercise, not just outdoors, is usually associated with better vitamin D status.
PMID: 28139795 DOI: 10.1039/c6pp00329j
Publisher wants £ 42 for the PDF