HMF Travel Probiotic Dairy & Gluten Free Formula by Seroyal/GenestraBrands is Shelf-Stable, no refrigeration required. Great to pack in your travel bag anywhere. When travelling, you may be introduced to different farming and cooking practices that may introduce "bad bacteria" in the gut. Intestinal/gastrointestinal distress like unwelcome bowel movements and upset tummy. HMF Travel taken 5 days before departure to get you started on a balanced gut flora. Balanced 'good and bad bacteria' treated after you get home from your vacation. Make your vacation a Healthy experience. I received this product #gotitfree a winning contest.