Traveling can cause physical and emotional stress (with packing, making sure you make your flight on time, sticking to a strict schedule, etc.) can weaken your immune system. Travel cheerfully to keep your immune system strong and your energy levels up. It will keep you motivated and active if you take the right vitamins. Simple components like cucumber, honey, and lemon mixed in pure drinking water will help you maintain your energy levels while also providing the body with essential vitamins.