Lactobacillus gasseri BNR17

What does the research say about Lactobacillus gasseri BNR17?

4 health outcomes synthesised

Research has investigated Lactobacillus gasseri BNR17 for four health outcomes, mostly in obese adults and individuals with digestive complaints. The highest concentration of evidence is for reduced waist circumference, where all 3 available studies reported beneficial effects, though the evidence base is preliminary. Dosing information across studies is inconsistent, with only one reported dose of 10 billion CFU per day for hip circumference.

Strongest evidence The strongest evidence for Lactobacillus gasseri BNR17 is for reduced waist circumference and reduced abdominal pain, both supported by 3 studies each with all studies reporting benefit (evidence strength rated low). For waist circumference, a meta-analysis reported a mean reduction of 1.41 cm, with effect sizes ranging from small to moderate in obese adults. For abdominal pain, all 3 randomized controlled trials showed statistically significant improvements (moderate to large effect sizes) in populations with functional constipation or irritable bowel syndrome.

Mixed or weaker evidence Evidence for reduced body weight is mixed: only 1 of 3 studies found a significant benefit (a meta-analysis showing 1.16 kg reduction), while 2 trials found no statistically significant difference. For reduced hip circumference, 2 of 3 studies reported small beneficial effects, but 1 found no significant effect. Both outcomes are supported by low-strength evidence.

Effective dose patterns Dosing information was inconsistently reported across syntheses. For hip circumference, the only reported dose is 10¹⁰ CFU/day. No specific effective dose range could be derived for other outcomes due to incomplete reporting. This limits conclusions about optimal intake.

Population insights The available research focuses on obese adults (for waist circumference, body weight, and hip circumference) and individuals with functional constipation or irritable bowel syndrome (for abdominal pain). No studies were identified in children, elderly, or general healthy populations.

Notable caveats

The evidence base is small for all outcomes (only 3 studies each), making conclusions preliminary.
Publication bias is a concern — null-result studies are less likely to be published.
Study durations and dosing regimens were not consistently reported across trials, making it difficult to generalize findings or define optimal usage.

Frequently asked

What is Lactobacillus gasseri BNR17 good for according to research?
Research suggests Lactobacillus gasseri BNR17 may help reduce waist circumference and abdominal pain, based on 3 studies each showing beneficial effects. There is also preliminary evidence for modest reductions in body weight and hip circumference, but these findings are less consistent.
What dose of Lactobacillus gasseri BNR17 is typically used in studies?
Dosing information across studies was inconsistently reported. For hip circumference, one study used a dose of 10¹⁰ CFU per day. No consistent effective dose range could be determined for other outcomes due to incomplete reporting.
Who benefits most from Lactobacillus gasseri BNR17?
The research has primarily studied obese adults for weight- and waist-related outcomes, and women with functional constipation or people with irritable bowel syndrome for abdominal pain. No studies have been conducted in children, elderly, or general healthy populations.
Are there caveats or limitations in the research on Lactobacillus gasseri BNR17?
Yes. The evidence base is small — only 3 studies per outcome — so conclusions are preliminary. There is a risk of publication bias since positive results are more likely to be published. Many studies did not consistently report study duration or dosing, which limits comparability and the ability to determine optimal use.
Does Lactobacillus gasseri BNR17 help with weight loss?
The evidence for weight loss is mixed. One meta-analysis reported a modest reduction of 1.16 kg, but two other randomized controlled trials found no statistically significant difference. Overall, the effect on body weight appears small and inconsistent.
Can Lactobacillus gasseri BNR17 reduce belly fat?
All 3 available studies reported beneficial effects on waist circumference, with a meta-analysis showing a mean reduction of 1.41 cm. However, the evidence base is small and considered preliminary, so findings should be interpreted cautiously.