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A systematic review of the effects of Lactococcus lactis subsp. cremoris H61 (heat-killed) on supporting iron supplementation

Effect of Lactococcus lactis subsp. cremoris H61 (heat-killed) on iron absorption and iron status in healthy adults: A systematic review - H61-IRON-SR

Status
Active, not recruiting
Phases
Unknown
Study type
Unknown
Source
JPRN
Registry ID
JPRN-UMIN000061180
Enrollment
Unknown
Registered
2026-04-20
Start date
2026-04-07
Completion date
Unknown
Last updated
2026-06-29

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

Conditions

Healthy adults (generally aged 18 years or older) without apparent iron-deficiency anemia or chronic diseases

Interventions

None listed

Sponsors

Japan Clinical Trial Association
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Participants Healthy adults (generally aged 18 years or older) without apparent iron-deficiency anemia or chronic diseases Interventions Continuous intake of Lactococcus lactis subsp. cremoris H61 (heat-killed) Comparators Placebo or no intake Outcomes Primary outcome: Serum ferritin Secondary outcomes: Serum iron, transferrin saturation (TSAT), hemoglobin, and other iron metabolism-related parameters If direct indicators of iron absorption, such as those measured using stable isotope techniques, are reported, they will also be evaluated. Study design Randomized controlled trials (RCTs) and non-randomized intervention studies

Exclusion criteria

Exclusion criteria: Animal studies, in vitro studies, studies including only patients with specific diseases, studies using lactic acid bacteria other than H61 alone, and studies that did not report iron-related outcomes

Design outcomes

Primary

MeasureTime frame
Serum ferritin level

Secondary

MeasureTime frame
Serum iron, transferrin saturation (TSAT), hemoglobin, and other iron metabolism-related parameters. If direct indicators of iron absorption, such as those measured using stable isotope techniques, are reported, they will also be evaluated.

Countries

Japan

Contacts

Public ContactTakeshi Kaneko

Japan Clinical Trial Association N/A

info@yakujihou.org0364574666

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026