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The Keele Study

A double blind, placebo controlled, randomised pilot trial examining the effects of probiotic administration on mood and cognitive function

Aim

This randomised, double blind, placebo controlled study examined the effects of Lab4 probiotics on general feelings of anxiety, mood and cognitive function in healthy individuals.

Method

  • The study took place at the School of Psychology at Keele University.
  • 50 healthy volunteers (19-38 years old, BMI<30) were divided into two groups.
  • Group 1 received placebo daily for 6 weeks.
  • Group 2 received daily 50 billion Lab4 probiotics for 6 weeks.
  • Volunteers completed mood and anxiety questionnaires (Bond Lader Mood Scales, Stait Trait Anxiety Inventory)
  • Participants also completed a comprehensive computerised cognitive battery of tests (COMPASS)

Results

‘Trait’ Anxiety
(individual’s tendency to experience anxiety in response to the anticipation of a future threat, how individuals felt over the previous 6 weeks)
  • Lab4 probiotics significantly decreased ‘trait’ anxiety levels compared to the placebo group, where the ‘trait’ anxiety levels increased over the course of the 6 weeks supplementation (P=0.042).
  • The Keele Study - ProVen Probiotics
    The Keele Study - ProVen Probiotics
    ‘Continuity of attention’
    (ability to focus and avoid distraction)
  • ‘Continuity of attention’ significantly increased in response to the Lab4 supplementation and decreased in the placebo group (P=0.035).
  • Conclusion

    The study showed the benefit of Lab4 probiotics for cognitive function in healthy individuals.

    Reference

    Owen L, et al 2014. A double blind, placebo controlled, randomised pilot trial examining the effects of probiotic administration on mood and cognitive function.
    Proceedings of the Nutrition Society 2014, 73 (OCE1): E29

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