Strengthen your immune system and reduce your risk of illness with evidence-based nutrition, supplementation, and lifestyle strategies for adults over 50.
Written by Dr. Sarah Mitchell, RD, PhD • Reviewed by Dr. James Chen, MD • Updated March 2026
The immune system naturally weakens with age — a process called immunosenescence — making older adults more vulnerable to infections, slower to recover, and less responsive to vaccines. But this decline is not inevitable or irreversible. Research shows that targeted nutrition, regular exercise, quality sleep, and strategic supplementation can significantly strengthen immune function in adults over 50.
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