Natren's Lactobacillus bulgaricus LB-51 super strain is a transient beneficial bacteria that travels with food through the digestive tract as it is processed by the body. L. bulgaricus is, the authentic yogurt bacteria discovered by renowned Nobel Laureate Dr. Ilya Metchnikoff, who described the benefits of this helpful bacteria in his book The Prolongation of Life: Optimistic Studies at the turn of the 20th century. The long-lived Bulgarian people still consume this beneficial bacteria in plain Bulgarian style yogurt.

Natren's Lactobacillus bulgaricus LB-51 super strain is a transient beneficial bacteria that travels with food through the digestive tract as it is processed by the body. L. bulgaricus is, the authentic yogurt bacteria discovered by renowned Nobel Laureate Dr. Ilya Metchnikoff, who described the benefits of this helpful bacteria in his book The Prolongation of Life: Optimistic Studies at the turn of the 20th century. The long-lived Bulgarian people still consume this beneficial bacteria in plain Bulgarian style yogurt.

Natren's Bifidobacteria super strain prefers to reside along the walls of the large intestine.* The large intestine serves as the body's waste and disposal management system. It needs to maintain a healthy balance of specific flora, which Bifidobacterium bifidum provides.