Why You Get Sick When You Travel — And How to Stop It Before It Starts

Travel should leave you with memories—not illness. In Episode 29 of the Functional Living Podcast, Dr. Jared Leon explores why so many people experience fatigue, congestion, digestive issues, or illness after traveling, and why it often has less to do with germs than with how prepared your body is before the journey begins. Dr. Leon explains how travel places significant demands on both the nervous system and the body. From disrupted sleep schedules and dehydration to changes in routine, stress, and sensory overload, these factors can weaken your body's ability to adapt—making you more susceptible to feeling run down or getting sick. This episode focuses on preparing your body before you travel, rather than simply reacting afterward. Dr. Leon shares practical strategies to help optimize your nervous system, support your immune function, and improve your body's resilience so you can better handle the physical demands of traveling. Whether you're traveling for business, vacation, or simply spending long hours on the road, this episode will give you a new perspective on why travel affects the body—and what you can do to stay healthy along the way. Because the healthiest travelers aren't the luckiest—they're the ones whose bodies are prepared to adapt.