Final answer:
Zinc is known to reduce the duration and severity of the common cold when taken early on, and high doses of vitamin C can also be beneficial. However, zinc can interact with medications for anxiety and high serum cholesterol, making it important to consult with healthcare professionals before using these supplements.
Step-by-step explanation:
Zinc has been substantiated in scientific literature as a supplement that may help decrease the duration of the common cold when administered within 24 hours of symptom onset. High doses of vitamin C are also noted to reduce the duration and severity of the common cold, with citrus fruits and green vegetables being excellent sources. However, one must be cautious as zinc interactions with drugs taken for high serum cholesterol and anxiety could pose risks.
When considering supplements like zinc and vitamin C for cold relief, it is crucial to also consider their interaction with other medications. For individuals with high serum cholesterol, this is particularly important because commonly prescribed medications for this condition could interact negatively with these supplements.
Therefore, consulting healthcare professionals before beginning any new supplement regimen is always advisable, especially when on medication for chronic conditions such as high serum cholesterol or anxiety.