Immune Support
Give your daily defenses a reinforcement.
Day-to-day immune resilience is built on sleep, nutrition, and activity. These supplements address the nutrients most closely tied to immune function, and are most valuable when you're genuinely running low.
What to look for
Core nutrients your immune system depends on year-round.
What the research supports
Recommended supplements
- Vitamin D3Many people run low, especially in winter. Pooled trial data show supplementation modestly reduces the risk of respiratory infections, with the biggest benefit in those who were deficient.
- ZincInvolved in immune-cell function. Started early, zinc lozenges have been shown to shorten the duration of a common cold in randomized trials.
- Vitamin CA long-standing staple. Regular use doesn't appear to prevent colds in most people, but it consistently shortens how long they last.
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Things to keep in mind
More isn't better — high-dose zinc taken long-term can deplete copper, and very high vitamin D needs monitoring. It's worth checking your vitamin D level before high-dose use.
Educational information only. These statements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement.
References
Recommendations on this page are informed by published research. This is educational information, not medical advice.
- Martineau AR, Jolliffe DA, Hooper RL, et al. Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data. BMJ. 2017;356:i6583. View study →
- Hemilä H, Petrus EJ, Fitzgerald JT, Prasad A. Zinc acetate lozenges for treating the common cold: an individual patient data meta-analysis. Br J Clin Pharmacol. 2016;82(5):1393-1398. View study →
- Hemilä H, Chalker E. Vitamin C for preventing and treating the common cold. Cochrane Database Syst Rev. 2013;(1):CD000980. View study →Note: Regular vitamin C doesn't appear to prevent colds in the general population, but it modestly shortens how long they last.