Probiotics for Hay Fever Trial – Seeking Participants

Update 11.11.2020: Recruitment for this trial is now closed

We are seeking Expressions of Interest for participation in the Probiotics for Hay Fever Trial.

NIIM is undertaking a clinical research trial investigating the effect of probiotic supplements on hay fever (seasonal allergic rhinitis).

Participants must be:

  • aged 18-65 years old;
  • have a history of hay fever or seasonal allergic rhinoconjunctivitis during the spring/summer peak season in Australia (Nov/ Dec);
  • are able to visit the NIIM clinic in Melbourne, VIC.

A randomised double-blind placebo-controlled parallel trial of 12 weeks duration investigating the efficacy of a probiotic formulation on reducing symptoms of seasonal allergic rhinitis.

Participation will involve:

  • Taking a probiotic supplement for 12 weeks starting in the month prior to peak season (Oct) and during peak season (Nov/ Dec);
  • daily recording of symptoms and medication use in a supplied questionnaire diary;
  • blood and stool tests at the start and end of the trial.

For more Information and Expressions of Interest:

Update 11.11.2020: Recruitment for this trial is now closed

or email directly to: / Subject heading: Hayfever Trial 


To assess eligibility, we require you to fill in an online questionnaire asking you to reflect on your symptoms and impact on your quality of life during the last years’ hayfever seasons.