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ImmuneCited

Vitamin D 用于 Upper Respiratory Tract Infections

A

Lancet 2025 meta-analysis shows vitamin D supplementation may help protect against acute respiratory infections, with strongest effects in individuals with baseline 25(OH)D levels below 25 nmol/L. Optimal protective dosing appears to be 400-1,200 IU/day rather than intermittent bolus dosing.

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结论

Lancet 2025 meta-analysis shows vitamin D supplementation may help protect against acute respiratory infections, with strongest effects in individuals with baseline 25(OH)D levels below 25 nmol/L. Optimal protective dosing appears to be 400-1,200 IU/day rather than intermittent bolus dosing.

Key Study Findings

Review
UCI Sports Nutrition Project: The Role of Nutrition in the Prevention and Management of Illnesses …
Dose: None vs: None Outcome: None 效果: None None

研究人群: Elite/professional cyclists nutrition review

Systematic Review
Interventions for preventing the progression of autosomal dominant polycystic kidney disease.
Dose: Disease-modifying agents (tolvaptan, etc.) vs: Placebo or standard care Outcome: Kidney disease progression 效果: None None

研究人群: Patients with ADPKD

Review
Nutraceuticals and pharmacological to balance the transitional microbiome to extend immunity during COVID-19 and other …
Dose: Probiotics, nutraceuticals vs: None Outcome: Immune response modulation in COVID-19 效果: None None

研究人群: COVID-19 patients with gut dysbiosis

Review
Revisiting Vitamin D Guidelines: A Critical Appraisal of the Literature.
Dose: 600-800 IU (DRI) or higher vs: None Outcome: Skeletal and extra-skeletal health benefits 效果: None None

研究人群: General population (guideline comparison)

Meta-Analysis n=5748
High-dose oral vitamin D supplementation for prevention of infections in children aged 0 to 59 …
Dose: 400 IU vs: Placebo Outcome: None 效果: None None

研究人群: Healthy adults

Case-Control 26.0 weeks
Vitamin D - An Elixir for Recurrent Upper Respiratory Tract Infection.
Dose: 98% vs: control Outcome: None 效果: None None

研究人群: None

Key Statistics

40

研究数量

30000

受试者

Positive

A

等级

Referenced Papers

Endocrine practice : … 2024 24 次引用
Dermatologic therapy 2022 42 次引用
International journal of … 2018 165 次引用
European journal of … 2016 93 次引用
Journal of general … 2016 38 次引用
Indian journal of … 2013 24 次引用
Acta scientiarum polonorum. … 2012 11 次引用
International journal of … 2011 49 次引用
Diseases of the … 2001 7 次引用

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

常用剂量

general:
600-800 IU/day
immunesupport:
1,000-2,000 IU/day
deficiencycorrection:
4,000-5,000 IU/day (under medical supervision)

上限: 4,000 IU/day (100 mcg)

研究中使用的剂量

剂量 持续时间 效果 N
None -- Mixed --
Disease-modifying agents (tolvaptan, etc.) -- Positive --
Probiotics, nutraceuticals -- Positive --
600-800 IU (DRI) or higher -- Positive --
400 IU -- Negative 5748
98% 26.0 weeks Mixed --
None -- Positive --
None -- Positive 50554

最佳服用时间: With a meal containing fat for better absorption

Safety & Side Effects

已报告的副作用

  • Hypercalcemia at very high doses (nausea, vomiting, weakness)
  • Kidney stones with excessive long-term use
  • Constipation
  • Metallic taste

已知相互作用

  • Thiazide diuretics (may increase risk of hypercalcemia)
  • Corticosteroids (reduce vitamin D absorption and metabolism)
  • Orlistat and cholestyramine (reduce fat-soluble vitamin absorption)
  • Statins (vitamin D may affect statin metabolism)

可耐受最高摄入量: 4,000 IU/day (100 mcg)

在开始服用任何补充剂之前,请务必咨询您的医疗保健提供者。

Frequently Asked Questions

Does Vitamin D help with Upper Respiratory Tract Infections?
Based on 40 studies with 30,000 participants, there is strong evidence from multiple clinical trials that Vitamin D may support Upper Respiratory Tract Infections management. Our evidence grade is A (Strong Evidence).
How much Vitamin D should I take for Upper Respiratory Tract Infections?
Studies have used various dosages. A commonly studied range is 600-800 IU/day. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of Vitamin D?
Reported side effects may include Hypercalcemia at very high doses (nausea, vomiting, weakness), Kidney stones with excessive long-term use, Constipation, Metallic taste. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for Vitamin D and Upper Respiratory Tract Infections?
We rate the evidence as Grade A (Strong Evidence). This rating is based on 40 peer-reviewed studies with 30,000 total participants. The overall direction of effect is positive.

Related Evidence

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