Bacillus coagulans IDCC 1201, 5 billion CFU/day,
does it really help with Improved polysomnographic sleep efficiency after four weeks in adults with sleep disturbance?
research showsGrade C. In the per-protocol population of 78 from an 80-person trial, sleep-efficiency change was +13.71±21.14 points versus -0.15±13.35, a +13.86-point difference (P=.002); no confidence interval was reported. The trial was registered seven months after completion, baseline sleep efficiency differed, and the manufacturer fully funded it.
ads claimThe finding is limited to IDCC 1201, 5 billion CFU one hour before bed, for four weeks. It does not establish a class effect or treatment of diagnosed insomnia.
Useful facts when choosing a product
- Sleep efficiency is the proportion of time in bed actually spent asleep.
- Severe insomnia and diagnosed sleep disorders were excluded.
- Baseline imbalance remains important even though adjusted analysis was positive.
What the research actually shows
The double-blind placebo-controlled trial randomized 80 adults, 40 per arm, and analyzed 39 per arm in the per-protocol efficacy set. Enrollment began February 3, 2025 and the trial ended July 2, 2025, but CRIS registration KCT0011568 occurred February 2, 2026, after completion. Ildong Bioscience funded the study and supplied active and placebo capsules; Hayoung Kim, Jinho Lee, Won Yeong Bang, Han Bin Lee, and Jin Seok Moon were employees. The paper states that the company had no role in recruitment, collection, outcome assessment, or statistical analysis.
Why this is classified as C (50)
A positive PSG result is limited by one manufacturer trial, an 80-person per-protocol analysis, four weeks, and retrospective registration, giving C with 50 points.
Counterpoint. Subjective insomnia relief and PSG efficiency are different endpoints, and strain-specific results vary.
Rejudgment record. Cross-check applied — Positive PSG sleep-efficiency and adjusted results, limited by manufacturer-only evidence, retrospective registration, and a small short per-protocol analysis
| Endpoint | S | Surrogate marker - laboratory or imaging measures |
| Replication | R1 | Single confirmatory trial |
| Independence | I0 | Evidence comes only from manufacturer studies |
| Effect size | E+ | Meets the clinically important threshold |
The scoring table and the verdict agree (C).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Improved four-week PSG sleep efficiency | C | Adjusted analysis was also positive, but this is one short manufacturer trial. |
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Study 1 | Double-blind randomized placebo-controlled PSG trial | 39 | Ildong Bioscience funding and active/placebo products; five employee authors | Change from baseline to week 4 in PSG sleep efficiency | +13.71±21.14 vs -0.15±13.35 points; difference +13.86 points, P=.002; baseline-adjusted P=.015; CI not reported | Single retrospectively registered manufacturer trial |
Receipt — 1 References
All 1 cited sources were verified for existence at the original page (as of 2026-08-26).
Final verification and publication gate: Codex · Verification cutoff: 2026-08-26 · Corrections: none
Cite this verdict
[Chamgap] Benefit of Bacillus coagulans IDCC 1201 for Four-Week Sleep Efficiency — Evidence Grade C·50. 1 cited sources checked. Source: https://chamgap.com/en/verdicts/sleep/bacillus-coagulans-idcc-1201-sleep-efficiency/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.