
Researchers at Kyushu College have demonstrated that yogurt consumption will increase the variety of intestine microbiota and alters its composition. Moreover, bathing in chloride sizzling springs after yogurt consumption was discovered to enhance defecation standing greater than yogurt alone.
These findings recommend that combining two way of life interventions—yogurt consumption and sizzling spring bathing—could contribute to raised well being, highlighting their potential software for preventive medication.
The examine was revealed within the journal Frontiers in Diet.
Sustaining a wholesome intestine surroundings is significant for total well being, because it performs a key position in regulating digestion, immune responses, and even neurological operate. Yogurt, which accommodates prebiotic microorganisms corresponding to lactic acid micro organism and bifidobacteria, has been recognized to modulate the intestine microbiota and supply a spread of well being advantages.
On this context, researchers at Kyushu College centered on Japanese sizzling springs, often known as Onsen. “We’ve got beforehand reported the helpful results of onsen bathing on the intestine microbiota. Nevertheless, little has been recognized about how the mix of weight loss plan and onsen bathing influences well being,” says Professor Shunsuke Managi of Kyushu College’s City Institute, who led the analysis.
“Subsequently, we collaborated with Beppu Metropolis right here in Kyushu, a area well-known for its onsen, to research the consequences of onsen bathing after yogurt consumption.”
This examine enrolled 47 wholesome grownup women and men who had not bathed in onsens inside 14 days previous to the beginning of the trial. The individuals had been then randomly assigned to one among three teams: a management group, a yogurt group, and a yogurt plus onsen group.

The management group acquired no intervention, whereas the yogurt group consumed 180 g of low-sugar yogurt containing Lactobacillus bulgaricus and Streptococcus thermophilus after dinner each day. Along with this, the yogurt plus onsen group bathed in Beppu’s chloride spring for greater than quarter-hour no less than as soon as each two days.
Earlier than and after the four-week intervention interval, intestine microbiota surveys had been performed utilizing stool samples, and a questionnaire on defecation standing containing 14 objects which included evaluating stool frequency, stool consistency, the feeling of incomplete evacuation, and using laxatives was administered.
The outcomes revealed a big enhance in intestine microbiota range within the yogurt group, accompanied by modifications within the relative abundance of a number of bacterial species.
Notably, these microbial modifications weren’t noticed in both the management group or the yogurt plus onsen group. Nevertheless, each the yogurt group and the yogurt plus onsen group demonstrated vital enhancements in defecation standing scores, with the latter exhibiting a extra pronounced impact.
These findings recommend that yogurt consumption could improve intestine microbial range, and that its mixture with onsen bathing could exert an additive or synergistic impact to enhance defecation standing.
“Though the pattern measurement is small, our findings recommend that combining two accessible way of life interventions—yogurt consumption and onsen bathing—could provide enhanced well being advantages, notably by selling intestine microbiota range and enhancing defecation standing in wholesome adults,” explains Managi.
“These outcomes are particularly related given the rising curiosity in non-pharmaceutical, lifestyle-based methods for preventive well being and wellness. Moreover, this analysis could help the event of evidence-based wellness tourism, notably in areas recognized for his or her onsen, by offering scientific validation for health-oriented journey and companies.”
Extra data:
Jungmi Choi et al, Dietary and environmental modulation for the intestine surroundings: yogurt promotes microbial range whereas chloride sizzling springs enhance defecation standing in wholesome adults, Frontiers in Diet (2025). DOI: 10.3389/fnut.2025.1609102
Quotation:
Yogurt and sizzling spring bathing present a promising mixture for intestine well being (2025, August 22)
retrieved 22 August 2025
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