“Lactobacillus paracasei?”Here!

Biotech

Hasn’t appeared in a scanned product yet.

As a supplement

Talk to your doctor or pharmacist.

Roll Call does not check drug interactions or assess personal safety.

A strain of Lactobacillus, a genus of lactic-acid-producing bacteria naturally present in the human gut and in fermented foods.

Why it’s used

Taken as a probiotic to support digestive comfort and gut microbiota balance.

What the evidence says

NCCIH notes that probiotic effects are highly strain- and dose-specific. Evidence for Lactobacillus paracasei specifically is limited, with some small studies suggesting effects on digestive symptoms but no strong overall consensus.

Context

Studies of Lactobacillus strains report dosing in colony-forming units rather than mass, typically ranging from millions to tens of billions of CFU per day, with results varying by strain and product.

Rumors

1
Lactobacillus paracasei supplements support the immune system.
Unresolvedhealth and safety evidence
Studied in: adults with grass pollen allergic rhinitis.
Measured as an outcome.
- Oral administration of Lactobacillus paracasei NCC 2461 for the modulation of grass pollen allergic rhinitis: a randomized, placebo-controlled study during the pollen season (Peer-reviewed) · Funded by Nestec S.A. (Nestlé) (industry) · Authors declare a conflict of interest
- Comparison of two oral probiotic preparations in a randomized crossover trial highlights a potentially beneficial effect of Lactobacillus paracasei NCC2461 in patients with allergic rhinitis (Peer-reviewed) · Funding not checked · No conflicts declared
Who’s saying this
- Amazon.com, Inc. — a retailer: online store selling products across many departments
  How we know who this is
  “© 1996-2026, Amazon.com, Inc. or its affiliates” (their page)
2
Lactobacillus paracasei causes gas and upset stomach.
Does not support — suggestivehealth and safety evidence
Studied in: adults with symptomatic uncomplicated diverticular disease (SUDD).
Measured as an outcome.
- Lactobacillus Paracasei CNCM I 1572 is Better than Placebo in Preventing Acute Diverticulitis Occurrence (Revised Manuscript 661a120f-b910-4133-ab7e-4bd3e1713c96) (Peer-reviewed) · Funded by Università Cattolica del Sacro Cuore (open access); product supplied by Sofar S.p.A. · Authors declare a conflict of interest
- Comparison of two oral probiotic preparations in a randomized crossover trial highlights a potentially beneficial effect of Lactobacillus paracasei NCC2461 in patients with allergic rhinitis (Peer-reviewed) · Funding not checked · No conflicts declared
- A Heat-Inactivated Two-Strain Lacticaseibacillus paracasei Fermented Milk as a Postbiotic for Functional Constipation: A Randomized, Double-Blind, Placebo-Controlled Trial (Peer-reviewed) · Funded by China Association for Science and Technology Youth Talent Promotion Project; National Technology Innovation Center for Dairy (government) · No conflicts declared
Who’s saying this
- WebMD — a publisher: health information publisher; an Internet Brands company
  How we know who this is
  “As a leader in digital health publishing for more than 25 years, WebMD strives to maintain the most comprehensive and reliable source of health and medical information on the internet.” (their page)
  “© 2005 - 2026 WebMD LLC, an Internet Brands company.” (their page)
3
Lactobacillus paracasei improves hay fever (grass pollen allergy).
Unresolvedhealth and safety evidence
Studied in: adults with grass pollen allergic rhinitis.
Measured as an outcome.
- Oral administration of Lactobacillus paracasei NCC 2461 for the modulation of grass pollen allergic rhinitis: a randomized, placebo-controlled study during the pollen season (Peer-reviewed) · Funded by Nestec S.A. (Nestlé) (industry) · Authors declare a conflict of interest
- Comparison of two oral probiotic preparations in a randomized crossover trial highlights a potentially beneficial effect of Lactobacillus paracasei NCC2461 in patients with allergic rhinitis (Peer-reviewed) · Funding not checked · No conflicts declared
Who’s saying this
- RxList — a publisher: drug information resource; owned by WebMD
  How we know who this is
  “RxList is an online medical resource dedicated to offering detailed and current pharmaceutical information on brand and generic drugs.” (their page)
  “RxList.com - Owned and Operated by WebMD and part of the WebMD network.” (their page)
4
Lactobacillus paracasei helps with allergies and improves gut and mouth health.
Not gradedhealth and safety evidence
Sources cited — no verdict reached.
What was measured is not yet noted.
- Lactobacillus Paracasei CNCM I 1572 is Better than Placebo in Preventing Acute Diverticulitis Occurrence (Revised Manuscript 661a120f-b910-4133-ab7e-4bd3e1713c96) (Peer-reviewed) · Funded by Università Cattolica del Sacro Cuore (open access); product supplied by Sofar S.p.A. · Authors declare a conflict of interest
Who’s saying this
- WebMD — a publisher: health information publisher; an Internet Brands company
  How we know who this is
  “As a leader in digital health publishing for more than 25 years, WebMD strives to maintain the most comprehensive and reliable source of health and medical information on the internet.” (their page)
  “© 2005 - 2026 WebMD LLC, an Internet Brands company.” (their page)
5
Lactobacillus paracasei supports digestive health.
Supports — suggestivehealth and safety evidence
Studied in: adults with symptomatic uncomplicated diverticular disease (SUDD) without prior acute diverticulitis.
Measured as an outcome.
- Lactobacillus Paracasei CNCM I 1572 is Better than Placebo in Preventing Acute Diverticulitis Occurrence (Revised Manuscript 661a120f-b910-4133-ab7e-4bd3e1713c96) (Peer-reviewed) · Funded by Università Cattolica del Sacro Cuore (open access); product supplied by Sofar S.p.A. · Authors declare a conflict of interest
- A Heat-Inactivated Two-Strain Lacticaseibacillus paracasei Fermented Milk as a Postbiotic for Functional Constipation: A Randomized, Double-Blind, Placebo-Controlled Trial (Peer-reviewed) · Funded by China Association for Science and Technology Youth Talent Promotion Project; National Technology Innovation Center for Dairy (government) · No conflicts declared
Who’s saying this
- Amazon.com, Inc. — a retailer: online store selling products across many departments
  How we know who this is
  “© 1996-2026, Amazon.com, Inc. or its affiliates” (their page)