Recent scientific reviews suggest that oral zinc lozenges may reduce the duration of the common cold in adults, especially when high doses are started within 24 hours of symptom onset. However, the evidence remains inconsistent due to variations in product formulations, dosages, and potential study biases. While some benefit is noted for adults, the effectiveness for children is less certain, and safety concerns such as choking risks and adverse reactions are more prominent in younger populations. Common side effects include nausea and a persistent metallic taste, while intranasal zinc is strictly discouraged due to the risk of permanent loss of smell. Ultimately, while zinc may provide a therapeutic edge, it must be used cautiously as a short-term intervention to avoid toxicity and nutrient imbalances.