Vitamin C per Upper Respiratory Tract Infections
BResearch 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.
In sintesi
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
Popolazione: Elite/professional cyclists nutrition review
Popolazione: Children with inflammatory bowel disease (review)
Popolazione: Large genetic cohort (MR analysis)
Popolazione: COVID-19 patients with gut dysbiosis
Popolazione: Broiler chickens
Popolazione: None
Key Statistics
30
Studi
10000
Partecipanti
Positive
Grado
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Dosaggi di uso comune
- general:
- 75-90 mg/day
- acuteillness:
- 1,000-2,000 mg/day
- immunesupport:
- 200-1,000 mg/day
Limite massimo: 2,000 mg/day
Dosaggi studiati nella ricerca
| Dosaggio | Durata | Effetto | 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 |
Momento migliore per l'assunzione: With meals; divide doses >500 mg for better absorption
Safety & Side Effects
Effetti collaterali segnalati
- ⚠ 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
Interazioni note
- ● 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)
Livello di assunzione massimo tollerabile: 2,000 mg/day
Consultare sempre il proprio medico prima di iniziare qualsiasi integratore.Consultate sempre il vostro medico prima di iniziare qualsiasi integratore.
Frequently Asked Questions
Does Vitamin C help with Upper Respiratory Tract Infections?
How much Vitamin C should I take for Upper Respiratory Tract Infections?
Are there side effects of Vitamin C?
How strong is the evidence for Vitamin C and Upper Respiratory Tract Infections?
Related Evidence
Altri ingredienti per Upper Respiratory Tract Infections
Vitamin C per altre condizioni
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