Yeast mannan and bowel habits
What 2 graded rows on yeast mannan agree on for bowel habits, and where they differ. Counted side by side, never averaged.
Consensus finder Rows from the Yeast mannan page, reviewed Oct 21, 2026 How it decides
What the rows agree on
Each block and row is one graded row from the Yeast mannan page, with its PubMed record.
Your question
Yeast mannan and bowel habits
2 rows · 60 peopleSplit. 1 row found an improvement and 1 had mixed results.
- DGrade D× 2
- Rows
- 2
- Trials
- 2
- People
- 60
What the rows share
From the rowsThe best-graded row, grade D, is a randomized trial of 40 people (2023) and found an improvement.
The rows run from 20 to 40 people, published from 2023 to 2025: 2 single studies.
The rows
1 improved · 1 mixed- DGrade DDefecation frequency and stool volume · Improved
RCT · n 40 · 2023 · Healthy adults aged 22-64 with discomfort in defecation (Japan)
1.1 g/day · 4 weeks
Defecation frequency and stool volume increased significantly more than with placebo.
Row on the Yeast mannan page · PubMed 38201970 (opens PubMed)
- DGrade DStool frequency and gut symptoms in older adults · Mixed
Open-label trial · n 20 · 2025 · Older adults, mean age 71 (Florida, US)
15 g/day · 2 weeks after a 1-week baseline
Stool frequency trended up from 1.35 to 1.53 a day (P = .079); in the 8 people with 1 or fewer stools a day it rose from 0.84 to 1.19 (P = .016). Most gut symptoms did not change; cramping and bloating rose slightly.
Row on the Yeast mannan page · PubMed 40117931 (opens PubMed)