What is it: A 90-day supply of extra-strength acidophilus. Each acidophilus capsule contains a total of one billion Colony Forming Units, or CFUs, of the microfloras Lactobacillus acidophilus and Bifodobacterium longum, with a triple-layer capsule to ensure the survival of these live cultures and their resistance to stomach acid. With this auto-delivery program, you'll never run out. You'll automatically receive a new shipment approximately every 90 days for as long as you remain in the plan. Who is it for: Adults seeking nutritional support to help maintain overall immune system health and to promote digestive tract health by helping to maintain normal levels of intestinal microflora. May be especially useful for those seeking to replenish healthy intestinal bacteria following antibiotic therapy. Why is it different: The patented, triple-layer capsules do not require refrigeration. The encapsulation process protects and stabilizes the microflora so that, once taken, they can be released into the intestine.