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B-vitamin production by human gut microbes

The absorption of gut-microbe-produced-B-vitamins-in humans by oral administration of 13C cellulose - NIL

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2024/12/078304
Enrollment
15
Registered
2024-12-18
Start date
Unknown
Completion date
Unknown
Last updated
2025-11-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Interventions

Intervention1: NIL: NIL Control Intervention1: NIL: NIL

Sponsors

St Johns Medical College Bangalore
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: Apparently healthy adults of both sexes

Exclusion criteria

Exclusion criteria: 1. Subjects who are on B12 supplements. 2. Antibiotic use in the last 3 months. 3. Diarrhea in the last 3 months. 4. on special/fad diets. 5 History of gastrointestinal surgery ( bowel resection, gastrectomy, vagotomy, ileostomy, bariatric, colostomy) 6. Uncontrolled co-morbidities like diabetes hypertension and cardiovascular disease, or this with history of allergic or hypersensitive reaction, were excluded from the study. 7. Clinical suspicion of any of the vitamin B deficiencies

Design outcomes

Primary

MeasureTime frame
To determine whether colonic microbiota can synthesize vitamins for human host absorption by providing 13C labeled cellulose as substrateTimepoint: The study is over a course of 72 hours with sampling at baseline, 24, 30, 36, 42, 48, 60, 72 hours. Sampling before 24 hours may be done after analysis of pilot data.

Secondary

MeasureTime frame
To determine whether colonic microbiota can synthesize vitamins for human host absorption by providing 13C labeled cellulose as substrate to evaluate the association of measured microbial B12 levels in human blood with B12 status to identify specific bacterial strains in the microbe which are capable of measured vitamin productionTimepoint: The study is over a course of 72 hours with sampling at baseline, 24, 30, 36, 42, 48, 60, 72 hours. Sampling before 24 hours may be done after analysis pilot data.

Countries

India

Contacts

Public ContactShalini Gajanan Hegde

St. John’s Research Institute

pratibha@sjri.res.in9880714118

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 4, 2026