Zinc para Upper Respiratory Tract Infections
AMeta-analysis of 7 trials demonstrates zinc lozenges at 75+ mg/day may reduce cold duration by 33% when started within 24 hours of symptom onset. Zinc acetate lozenges at 80-92 mg/day showed 40% duration reduction. Doses below 75 mg/day showed no effect.
Conclusão
Meta-analysis of 7 trials demonstrates zinc lozenges at 75+ mg/day may reduce cold duration by 33% when started within 24 hours of symptom onset. Zinc acetate lozenges at 80-92 mg/day showed 40% duration reduction. Doses below 75 mg/day showed no effect.
Key Study Findings
População: patients with post-viral olfactory dysfunction (non-COVID)
População: None
População: Elite/professional cyclists nutrition review
População: Children/adolescents with undernutrition
População: Children with otitis media
População: respiratory disease
Key Statistics
15
Estudos
1500
Participantes
Positive
Nota
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Dosagens Comumente Utilizadas
- general:
- 8-11 mg/day
- coldtreatment:
- 75-100 mg/day elemental zinc (lozenges, within 24h of onset, up to 2 weeks)
- immunesupport:
- 15-30 mg/day
Limite superior: 40 mg/day (long-term)
Dosagens Estudadas em Pesquisas
| Dosagem | Duração | Efeito | N |
|---|---|---|---|
| tokishakuyakusan, zinc sulfate, methylcobalamin | -- | Positive | 107 |
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| Various oral nutritional supplements | -- | Positive | -- |
| 20 or 30 days treatment | 5 weeks | Positive | 120 |
| 31 μg | -- | Neutral | -- |
| 94.57% | -- | Mixed | -- |
| None | -- | Mixed | 387 |
Melhor horário: Lozenges: dissolve slowly in mouth every 2-3h at cold onset; Supplements: with food to minimize nausea
Safety & Side Effects
Efeitos Colaterais Relatados
- ⚠ Nausea and vomiting (especially on an empty stomach)
- ⚠ Metallic taste in the mouth
- ⚠ Copper depletion with chronic high-dose use (>40 mg/day)
- ⚠ Headache and diarrhea
Interações Conhecidas
- ● Copper supplements (zinc inhibits copper absorption at doses >40 mg/day)
- ● Tetracycline and quinolone antibiotics (mutual absorption reduction)
- ● Penicillamine (zinc reduces absorption of this rheumatoid arthritis drug)
- ● Iron supplements (mutual absorption interference when taken together)
Ingestão máxima tolerável: 40 mg/day (long-term)
Consulte sempre o seu profissional de saúde antes de iniciar qualquer suplemento.Sempre consulte seu profissional de saúde antes de iniciar qualquer suplemento.
Frequently Asked Questions
Does Zinc help with Upper Respiratory Tract Infections?
How much Zinc should I take for Upper Respiratory Tract Infections?
Are there side effects of Zinc?
How strong is the evidence for Zinc and Upper Respiratory Tract Infections?
Related Evidence
Outros ingredientes para Upper Respiratory Tract Infections
Aviso Legal da FDA: Estas declarações não foram avaliadas pela Food and Drug Administration. Os produtos e informações neste site não se destinam a diagnosticar, tratar, curar ou prevenir qualquer doença. As notas de evidência apresentadas são baseadas em nossa análise de pesquisas revisadas por pares publicadas e não constituem aconselhamento médico. Sempre consulte seu profissional de saúde antes de iniciar qualquer regime de suplementação.