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Bifidobacterium lactis

Supplement probiotic gutimmune
Aka: B. lactis, BB-12, HN019, Bifidobacterium animalis
Brands seen in Singapore: California Gold Nutrition, 21st Century, Garden of Life, NOW Foods, Lemme
Third-party tested: Garden of Life, Lemme certify other products with NSF Certified for Sport, but nothing for bifidobacterium lactis.Certification is granted per product, so check the tub you actually own. Not being listed is not the same as failing.
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Constipation and IBS symptoms — strain-specific data
Studied for
The hn019 trials ran 28 days, the IBS trial six weeks
Pros & cons
Pros
  • Constipation review favoured b. lactis specifically
  • Hn019 raised bowel movements in low-frequency adults
  • Bb-12 cut infant crying time vs placebo (n=80)
Cons
  • Hn019 missed its primary endpoint, colonic transit
  • That benefit came from a post-hoc subgroup of 65
  • Immune data mixes lab work with human studies
Sources
  1. NIH NCCIH — Probiotics: Usefulness and Safety · read 2026-08-27
    what it says
    “A 2014 review of 14 studies (1,182 participants) of probiotics for constipation in adults showed some evidence of benefit, especially for Bifidobacterium lactis.”
  2. NIH NCCIH — Probiotics: Usefulness and Safety, "Can probiotics be harmful?" · read 2026-08-27
    what it says
    “The risk of harmful effects from probiotics is greater in people with severe illnesses or compromised immune systems … Cases of severe or fatal infections have been reported in premature infants who were given probiotics”
  3. Effects of 28-day Bifidobacterium animalis subsp. lactis HN019 supplementation on colonic transit time and GI symptoms in functional constipation (Ibarra et al., Gut Microbes 2018) · read 2026-08-27
    what it says
    “no statistically significant differences in the primary or secondary outcomes … A post hoc analysis of 65 participants … showed a physiologically relevant increase in weekly BMF … 1 × 10^9 or 1 × 10^10 CFU of HN019/day”
  4. The therapeutic efficacy of Bifidobacterium animalis subsp. lactis BB-12 in infant colic (Nocerino et al., Aliment Pharmacol Ther 2020) · read 2026-08-27
    what it says
    “The rate of infants with reduction of ≥50% of mean daily crying duration was higher in infants treated with BB-12 … Eighty infants were randomised … BB-12 (1 × 10^9 CFU/day) or placebo for 28 days”
  5. Bifidobacterium animalis subsp. lactis HN019 effects on gut health: a review (Cheng et al., Front Nutr 2021) · read 2026-08-27
    what it says
    “B. lactis HN019™ has a beneficial role in maintaining intestinal barrier function … regulating host immune defense toward pathogens in both in vitro and human studies … reduced intestinal transit time and increased bowel movement frequency in functional constipation”
  6. Lactobacillus acidophilus DDS-1 and Bifidobacterium lactis UABla-12 improve abdominal pain severity and symptomology in IBS (Martoni et al., Nutrients 2020) · read 2026-08-27
    what it says
    “Three hundred and thirty adults … with IBS … Bifidobacterium animalis subsp. lactis UABla-12 (1 × 10^10 CFU/day) over six weeks … APS-NRS was significantly improved in both probiotic groups vs. placebo”
  7. iHerb Singapore — Probiotics category page (default best-selling order) · read 2026-08-27
    what it says
    “California Gold Nutrition, LactoBif® 30 Probiotics, 60 Veggie Capsules”
  8. HSA — Guidelines on prohibited and restricted ingredients in HS and TM (Oct 2025), Annex A/B · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list.”
  9. HSA — Health Supplements Guidelines (Jan 2026), working definition and Tables 4–5 · read 2026-08-27
    what it says
    “Vitamins, minerals, amino acids, fatty acids, enzymes, probiotics and other bioactive substances … Table 4: Vitamins Limits … Table 5: Minerals Limits”
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Updated 2026-08-30. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.