FOS, or Fructo Oligo Saccharides,
are natural carbohydrates that enhance replication of beneficial bacteria.
Products like Jarro Dophilus, from Jarrow Formulas, are intestinal pro-biotics
for all ages,
hypoallergenic, non-dairy, and
contain seven species of the hardiest of the Lactobacilli and Bifidobacteria
at a potency of 10-15 billion per gram at time of manufacture.