Bifidobacterium infantis (B. infantis) is a probiotic bacterium. It is common in some, but not all, breast-fed infants.
Like other Bifidobacterium species, B. infantis is a Gram-positive, non-motile, non-spore forming, rod-shaped lactic-acid bacteria.
B. infantis, as it is commonly known, is actually a sub-species of the Bifidobacterium longum species, but since products and supplements still refer to it separately, that’s what this website is doing to minimize confusion.
This probiotic is more specifically suited to the intestinal environment of breast-fed infants because it prefers to consume the prebiotic human milk oligosaccharides (HMO’s) found in human breast milk over other sources of energy.
It can, however, utilize other carbohydrates commonly found in a whole-foods diet of teens and adults, similar to other Bifidobacterium species of bacteria.
B. infantis generally survives stomach and bile acids, and is generally able to adhere to intestinal tissues.
B. infantis produces predominantly acetic acid, with other acid production more dependent on the type of prebiotic food it consumes.
Most B. infantis produce bacterocin-like inhibitory substances against pathogenic bacteria, and some strains are able to produce the B-vitamins thiamine (B1), nicotinic acid (a B3 derivative) and folate.
With a name like infantis, you would expect it to be harmless. So far the research shows that it is safe, and it is on the European QPS (Qualified Presumption of Safety) list along with other bifidobacteria.
One strain is the most famous of all at this time and it is B. infantis 35624 found in Align and Alflorex. Read about this special 35624 strain here.
Another strain was found not only to have probiotic probiotic properties in vitro, but also to be able to be incorporated into yogurt and survive below zero (C and F) temperatures for 60 days as frozen yogurt.
As you can see from the information above, actions of B. infantis are strain-specific. Read about the 35624 strain here.
One of the most widely studied strains of this species is “Bifantis”, B. infantis 35624, found in the probiotic supplement Align. (link takes you to my review of it) and in Alflorex (link takes you to my review of it).
B. infantis is one of the species in the extensively-studied probiotic VSL#3. (link takes you to my review of it)
Many products, such as Probifia Pearls, (link takes you to my review of it) contain undisclosed strains of B. infantis.
Return to the Bifidobacterium page.
Go to the B. infantis 35624 page.
Return to the Homepage.
I research studies and share my clinical experience to write this free site to help you find solutions to your problems. As part of that, I recommend products and services that I genuinely believe will be of help to you. If you click on a link to a product/service, I may receive a small commission if you buy something. The item does not cost you more.
Thanks for visiting this site! If you've enjoyed reading this page or have found the information to be useful to you, please "like", tweet about it, or share it so others can benefit, too. You can leave comments below via Facebook or Disqus.
Comment with Disqus (including as a guest), Twitter or Google accounts:
If you are one of my many readers without a Facebook account, you can still comment.
Disclaimer: Please note: By law, I cannot provide any personalized recommendations for your specific health concern on this site. The information contained in this site is educational in nature and is not intended as diagnosis, treatment, prescription or cure for any physical or mental disease, nor is it intended as a substitute for regular medical care. Consult with your doctor regarding any health or medical concerns you may have.
Subscribe to my monthly newsletter and receive a free copy of "The Quickstart Guide to Probiotics."
To comply with the EU's GDPR data privacy regulation, please subscribe here:
Some competitors of SBI (Solo Build It) are posting fake negative reviews of SBI. If you are considering creating your own website business, or if you have a brick-and-mortar business but want an online presence, I highly recommend SBI!