She is a expert in vitamin d.Not according to her publication record, she isn't. She appears to be an expert in the cell biology of neurodegenerative diseases.
Dr. Patrick trained as a postdoctoral fellow at Children’s Hospital Oakland Research Institute with Dr. Bruce Ames. She investigated the effects of micronutrient (vitamins and minerals) inadequacies on metabolism, inflammation, DNA damage, and aging and whether supplementation can reverse the damage. In addition, she also investigated the role of vitamin D in brain function, behavior, and other physiological functions. In February of 2014 she published a paper in FASEB on how vitamin D regulates serotonin synthesis and how this relates to autism.
I don't know exactly how vitamin d converts and stores and all that. I know that the vast majority of people in the UK are insufficient.It probably makes for an adequate minimum, for most people; assuming they also get out a bit in warmer months.
The simple idea of Vit D is that it have a "ready" form and a "storage" form, with interconversion between the two. The storage can do a massive heap of storing. The obvious rationale here is that because Vit D is scarce in winter, evolution has expected us to build a load up in stores during summer that will get us through winter. Most people do get by fine without supplements because they get enough sun in the warmer months, and that'll get them through winter.
The implication of deficiency is persistent low production/intake leading to low "storage" - because otherwise the stores would be converted to the ready form. In such a situation, it would probably be advisable to give a "loading dose" of very high Vit D - say, take several thousand IUs a day for a week or two, or even a massive tens of thousands one-off dose - because to take just 400IUs daily would mean a lot of it would be sequestered for storage leaving relatively little for the ready use form, so it would take weeks-months to get the blood plasma concentration up. Take a lot in one big whack, it would fill up the stores very quickly and leave plenty for the ready form.
"Current recommendations for vitamin D supplementation are inadequate to address the growing epidemic of vitamin D insufficiency."
Background Vitamin D insufficiency is associated with suboptimal health. The prevalence of vitamin D insufficiency may be rising, but population-based trends are uncertain. We sought to evaluate US population trends in vitamin D insufficiency.Methods We compared serum 25-hydroxyvitamin...
Again, those bodies are basing their recommendations on bone health. We just recently started learning exactly what vitamin d even does.It beggars belief that you think Dr. Rhonda Patrick or the individual, anecdotal examples of Drs. Campbell and Fauci rate as more expert than bodies like the NIH, NHS, US Endocrine Society, Institute of Medicine, Mayo Clinic, Harvard University Medical School, etc. who have whole panels of experts to review the evidence base.
Obviously individual variation does factor in. Drs. Fauci and Campbell are old, age is known to be associated with impaired Vit D metabolism, so they may need more. There's also the question of whether Dr. Campbell's home test was accurate; plenty such tests are not.