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The Effects of probiotic supplementation in athletes

The Effects of probiotic supplementation on running performance in men athletes

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12621001461886
Acronym
PREP study
Enrollment
19
Registered
2021-10-26
Start date
2020-07-01
Completion date
2021-12-17
Last updated
2026-06-15

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

Conditions

None listed

Brief summary

32 healthy, fit men aged 18-45 years, with running as one component of their exercise regime will be recruited to receive daily supplementation of probiotics or placebo for 4 weeks. Then the effect on running time trial in the heat will be measured. This is a randomised cross-over design so that men will start either the treatment or placebo in the first phase and then continue with the control or treatment for the second phase of the study, so that all participants complete both phases, but in random order. Mucosal immunity will be determined by IgA in saliva by collection of saliva following the time trial.

Interventions

4 weeks of daily supplementation of NZMP PREP capsule containing 12 billion CFU probiotics. 3 weeks washout between cross-over conditions.

Sponsors

Fonterra Co-operative Group Limited
Lead SponsorCommercial sector/Industry

Study design

Allocation
Randomised controlled trial
Intervention model
Crossover
Primary purpose
Treatment
Masking
Blinded (masking used) (Subject, Caregiver)

Eligibility

Sex/Gender
Male
Age
18 Years to 45 Years
Healthy volunteers
Yes

Inclusion criteria

Healthy, fit men aged 18-45 years. With running as one component of their exercise regime

Exclusion criteria

Non-smokers, no antibiotics, probiotic supplements, or select fermented dairy for 3 weeks.

Outcome results

None listed

Source: ANZCTR · Data processed: Jun 21, 2026