Skip to main content
ImmuneCited

Vitamin C pour Upper Respiratory Tract Infections

B

Research suggests regular vitamin C supplementation may reduce cold duration by approximately 8% in adults and 14% in children. Supplementation at 1g+/day is associated with reduced severity of cold symptoms. Notably, vitamin C started after symptom onset does not appear to be effective.

<\/script>\n
`; }, get iframeSnippet() { const domain = 'immunecited.com'; const params = 'ingredient\u003Dvitamin\u002Dc\u0026condition\u003Dupper\u002Drespiratory\u002Dinfections'; return ``; }, get activeSnippet() { return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet; }, copySnippet() { navigator.clipboard.writeText(this.activeSnippet).then(() => { this.copied = true; setTimeout(() => { this.copied = false; }, 2000); }); } }" @keydown.escape.window="open = false" @click.outside="open = false">

Embed This Widget

Style



      
      
    

Widget powered by . Free, no account required.

B

En conclusion

Research suggests regular vitamin C supplementation may reduce cold duration by approximately 8% in adults and 14% in children. Supplementation at 1g+/day is associated with reduced severity of cold symptoms. Notably, vitamin C started after symptom onset does not appear to be effective.

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 Effet: None None

Population: Elite/professional cyclists nutrition review

Review
Micronutrient Deficiencies in Pediatric IBD: How Often, Why, and What to Do?
Dose: None vs: None Outcome: Micronutrient deficiency management in pediatric IBD Effet: None None

Population: Children with inflammatory bowel disease (review)

Other
Circulating micronutrient levels and respiratory infection susceptibility and severity: a bidirectional Mendelian randomization analysis.
Dose: 12 circulating micronutrients vs: Genetic instrument comparison Outcome: URTI, LRTI, pneumonia risk Effet: None None

Population: Large genetic cohort (MR analysis)

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 Effet: None None

Population: COVID-19 patients with gut dysbiosis

Randomized Controlled Trial
Zinc and L-Ascorbic Acid Dietary Supplementation Affected Antioxidant Status, Heat Shock Protein 70, and Some …
Dose: None vs: Basal diet without supplementation Outcome: Antioxidant status, hematology, growth in broilers Effet: None None

Population: Broiler chickens

Randomized Controlled Trial n=171 24 weeks Double-blind
Probiotics with vitamin C for the prevention of upper respiratory tract symptoms in children aged …
Dose: 12.5 billion cfu/d vs: placebo Outcome: None Effet: or 6 P=0.0300

Population: None

Key Statistics

30

Études

10000

Participants

Positive

B

Note

Referenced Papers

World journal of … 2015 62 citations
European journal of … 2012 225 citations
American family physician 2012
Clinical evidence 2003
Clinical evidence 2003
The British journal … 2002 358 citations
American family physician 2002
Canadian journal of … 2001 72 citations
Medicine and science … 2000 262 citations
Medicine and science … 2000 248 citations
Alternative medicine review … 2000
Canadian journal of … 1998 41 citations
Journal of applied … 1997 434 citations
International journal of … 1997 167 citations
Scandinavian journal of … 1977 56 citations

Dosage & Usage

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

Posologies couramment utilisées

general:
75-90 mg/day
acuteillness:
1,000-2,000 mg/day
immunesupport:
200-1,000 mg/day

Limite supérieure : 2,000 mg/day

Posologies étudiées dans la recherche

Posologie Durée Effet N
None -- Mixed --
None -- Neutral --
12 circulating micronutrients -- Mixed --
Probiotics, nutraceuticals -- Positive --
None -- Positive --
12.5 billion cfu/d 24 weeks Mixed 171
45% 988 weeks Positive 26282
None 13.0 weeks Mixed 3135

Moment optimal de prise : With meals; divide doses >500 mg for better absorption

Safety & Side Effects

Effets indésirables signalés

  • Gastrointestinal distress (nausea, diarrhea, cramps) at high doses
  • Increased risk of kidney stones in susceptible individuals
  • Interference with certain lab tests (glucose, occult blood)
  • Iron overload risk in hemochromatosis patients

Interactions connues

  • Enhances non-heme iron absorption (beneficial or harmful depending on iron status)
  • High doses may reduce effectiveness of certain chemotherapy agents
  • May interfere with anticoagulant therapy (warfarin) at high doses
  • Aluminum-containing antacids (increased aluminum absorption)

Apport maximal tolérable : 2,000 mg/day

Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.

Frequently Asked Questions

Does Vitamin C help with Upper Respiratory Tract Infections?
Based on 30 studies with 10,000 participants, there is moderate evidence from clinical studies that Vitamin C may support Upper Respiratory Tract Infections management. Our evidence grade is B (Good Evidence).
How much Vitamin C should I take for Upper Respiratory Tract Infections?
Studies have used various dosages. A commonly studied range is 75-90 mg/day. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of Vitamin C?
Reported side effects may include Gastrointestinal distress (nausea, diarrhea, cramps) at high doses, Increased risk of kidney stones in susceptible individuals, Interference with certain lab tests (glucose, occult blood), Iron overload risk in hemochromatosis patients. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for Vitamin C and Upper Respiratory Tract Infections?
We rate the evidence as Grade B (Good Evidence). This rating is based on 30 peer-reviewed studies with 10,000 total participants. The overall direction of effect is positive.

Related Evidence

Autres ingrédients pour Upper Respiratory Tract Infections

Vitamin C pour d'autres pathologies

Avertissement FDA: Ces déclarations n'ont pas été évaluées par la Food and Drug Administration. Les produits et informations sur ce site ne sont pas destinés à diagnostiquer, traiter, guérir ou prévenir quelque maladie que ce soit. Les notes de preuve présentées sont basées sur notre analyse de la recherche publiée et évaluée par des pairs et ne constituent pas un avis médical. Consultez toujours votre professionnel de santé avant de commencer tout régime de compléments alimentaires.