(Nature's Way) Nature’s Way Primadophilus Bifidus is the premier formula for true digestive health. The special enteric-coated capsules help to guarantee delivery of these friendly digestive helpers to your intestines, not your stomach. Normal capsules break down in the stomach, destroying the majority of the probiotics. The enteric coating ensures stomach acid survival and intestinal delivery, to help promote a healthier intestinal environment. Take one capsule per day. To retain maximum potency, keep refrigerated. Shipped with freezer packs.