Bifidobacterium 35624 is the trademarked name for a strain of beneficial bacteria, Bifidobacterium infantis 35624 (or Bifidobacterium 35624). Bifidobacterium 35624 is the natural probiotic ingredient found only in Align. The specific and pure strain of Bifidobacterium 35624 found in Align helps promote and support a healthy digestive system.* Align is the only probiotic supplement that contains Bifidobacterium 35624.