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Vitamin D Research Studies
Research Guide
What is Vitamin D Research Studies?
Vitamin D Research Studies is a body of scientific literature that examines the evaluation, treatment, and prevention of vitamin D deficiency along with its effects on bone health, cancer, cardiovascular disease, immune function, and other health outcomes.
This field encompasses 92,441 papers on topics including supplementation, epidemiology, genetic factors, and vitamin D's role in conditions such as diabetes and multiple sclerosis. Michael F. Holick (2007) in "Vitamin D Deficiency" reviews its prevalence in skeletal and nonskeletal health despite food fortification in the United States. "Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline" by Holick et al. (2011) recommends supplementation at daily intake levels based on age and circumstances due to the commonality of deficiency across age groups.
Topic Hierarchy
Research Sub-Topics
Vitamin D Deficiency
This sub-topic covers the prevalence, risk factors, diagnostic criteria, and global epidemiology of vitamin D insufficiency across populations. Researchers investigate demographic disparities, seasonal variations, and public health implications.
Vitamin D Supplementation
This sub-topic evaluates dosing regimens, efficacy, safety, and optimal formulations for correcting deficiency and maintaining levels. Researchers conduct RCTs and meta-analyses on outcomes like serum 25(OH)D changes and adverse effects.
Vitamin D and Bone Health
This sub-topic examines vitamin D's role in calcium homeostasis, fracture prevention, osteoporosis treatment, and bone mineral density. Researchers study interactions with calcium and effects in elderly and pediatric populations.
Vitamin D and Immune Function
This sub-topic explores immunomodulatory effects, including antimicrobial peptide induction and regulation of innate/adaptive immunity. Researchers link deficiency to infections, autoimmunity, and responses in conditions like COVID-19.
Vitamin D and Cardiovascular Disease
This sub-topic investigates associations between vitamin D status and risks of hypertension, myocardial infarction, and heart failure. Researchers analyze prospective cohorts, Mendelian randomization, and supplementation trials.
Why It Matters
Vitamin D research informs clinical guidelines for preventing fractures and managing deficiency-related conditions. "Vitamin D<sub>3</sub>and Calcium to Prevent Hip Fractures in Elderly Women" by Chapuy et al. (1992) showed that supplementation reduced hip fracture risk in elderly women. Holick (2007) in "Vitamin D Deficiency" addresses impacts on bone health and beyond, while Liu et al. (2006) in "Toll-Like Receptor Triggering of a Vitamin D-Mediated Human Antimicrobial Response" demonstrated vitamin D's role in macrophage antimicrobial activity against intracellular bacteria. These findings guide supplementation practices in osteoporosis prevention, as in Klibanski (2001) "Osteoporosis Prevention, Diagnosis, and Therapy", and public health strategies for widespread deficiency noted by Holick and Chen (2008).
Reading Guide
Where to Start
"Vitamin D Deficiency" by Michael F. Holick (2007), as it provides a foundational review of prevalence, health roles, and resolution challenges post-fortification, ideal for understanding core issues before guidelines or mechanisms.
Key Papers Explained
Holick (2007) "Vitamin D Deficiency" establishes prevalence and health impacts, which Holick et al. (2011) "Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline" builds into actionable supplementation recommendations. Liu et al. (2006) "Toll-Like Receptor Triggering of a Vitamin D-Mediated Human Antimicrobial Response" extends to immune mechanisms, while Chapuy et al. (1992) "Vitamin D<sub>3</sub>and Calcium to Prevent Hip Fractures in Elderly Women" provides fracture prevention evidence; Wortsman et al. (2000) "Decreased bioavailability of vitamin D in obesity" addresses a key modifier.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Field growth sustains focus on supplementation efficacy and deficiency epidemiology, with Holick's works like "Vitamin D deficiency: a worldwide problem with health consequences" (2008) emphasizing global consequences; no recent preprints shift priorities.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Vitamin D Deficiency | 2007 | New England Journal of... | 13.3K | ✕ |
| 2 | Evaluation, Treatment, and Prevention of Vitamin D Deficiency:... | 2011 | The Journal of Clinica... | 10.2K | ✓ |
| 3 | Osteoporosis Prevention, Diagnosis, and Therapy | 2001 | JAMA | 5.4K | ✕ |
| 4 | Definition and classification of cancer cachexia: an internati... | 2011 | The Lancet Oncology | 5.4K | ✕ |
| 5 | The 2011 Report on Dietary Reference Intakes for Calcium and V... | 2010 | The Journal of Clinica... | 4.0K | ✓ |
| 6 | Toll-Like Receptor Triggering of a Vitamin D-Mediated Human An... | 2006 | Science | 3.9K | ✕ |
| 7 | Decreased bioavailability of vitamin D in obesity | 2000 | American Journal of Cl... | 3.1K | ✓ |
| 8 | Vitamin D<sub>3</sub>and Calcium to Prevent Hip Fractures in E... | 1992 | New England Journal of... | 2.9K | ✓ |
| 9 | Sunlight and vitamin D for bone health and prevention of autoi... | 2004 | American Journal of Cl... | 2.7K | ✓ |
| 10 | Vitamin D deficiency: a worldwide problem with health conseque... | 2008 | American Journal of Cl... | 2.6K | ✕ |
Frequently Asked Questions
What causes vitamin D deficiency?
Vitamin D deficiency remains common despite food fortification, as few foods naturally contain it and sun exposure is often insufficient. Holick (2007) in "Vitamin D Deficiency" notes its prevalence affects skeletal and nonskeletal health. Supplementation is recommended per age and circumstances in Holick et al. (2011) "Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline".
How does vitamin D supplementation prevent fractures?
Supplementation with vitamin D3 and calcium reduces hip and nonvertebral fracture risk in elderly women. Chapuy et al. (1992) in "Vitamin D<sub>3</sub>and Calcium to Prevent Hip Fractures in Elderly Women" demonstrated this effect. Guidelines in Holick et al. (2011) endorse such interventions based on clinical evidence.
What is the role of vitamin D in the immune system?
Toll-like receptor activation in human macrophages induces vitamin D-mediated antimicrobial peptides against intracellular bacteria. Liu et al. (2006) in "Toll-Like Receptor Triggering of a Vitamin D-Mediated Human Antimicrobial Response" reported upregulation of these responses. This links deficiency to immune vulnerabilities.
Why is vitamin D bioavailability lower in obesity?
Obesity decreases vitamin D bioavailability due to sequestration in adipose tissue. Wortsman et al. (2000) in "Decreased bioavailability of vitamin D in obesity" established this mechanism. Higher doses may be needed for obese individuals.
What do clinical guidelines recommend for vitamin D intake?
The Endocrine Society recommends supplementation at suggested daily intake and upper limit levels depending on age and conditions. Holick et al. (2011) in "Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline" advises measuring 25-hydroxyvitamin D levels. The IOM report by Ross et al. (2010) summarizes population needs for skeletal and nonskeletal health.
Open Research Questions
- ? How does genetic variation influence vitamin D metabolism and deficiency risk across populations?
- ? What optimal serum 25-hydroxyvitamin D levels prevent nonskeletal health issues like cancer and cardiovascular disease?
- ? Does vitamin D supplementation reduce autoimmune disease incidence in high-risk groups?
- ? What are long-term effects of high-dose vitamin D on immune-mediated antimicrobial responses?
- ? How does vitamin D status interact with obesity to affect fracture risk prevention?
Recent Trends
The field holds steady at 92,441 papers with no specified 5-year growth rate.
Holick's highly cited reviews, such as "Vitamin D Deficiency" (2007, 13,332 citations) and the 2011 guideline (10,183 citations), continue dominating influences on supplementation and measurement practices.
No recent preprints or news alter established focuses on bone health, immunity, and deficiency prevention.
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