Herbal hope: new blend aims to shorten your next cold

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults aged 18-65 years living in Australia * Individuals with a history of recurrent Upper Respiratory Tract infections (URTI) (at least one episode per year) * Able to provide informed consent * Generally healthy * Agree to not participate in another clinical trial while enrolled in this trial * Agree to maintain their usual daily activities without significant changes. This includes not changing their current diet or stopping/starting a new exercise regimen during entire study period * Females of childbearing potential must use a prescribed form of birth control (e.g. oral contraceptive) Exclusion Criteria: * Serious illness e.g., liver disease, kidney disease, heart disease, mood disorders, autoimmune conditions, neurological disorders such as multiple sclerosis. * Unstable illness e.g., changing medication/treatment. * BMI \<18.5, \>30 * Current malignancy (excluding Basal Cell Carcinoma) or chemotherapy or radiotherapy treatment for malignancy within the previous 2 years. * Individuals with chronic respiratory conditions (e.g., asthma, chronic obstructive pulmonary disease). * Active smokers, nicotine use (including vaping/e-cigarettes) or drug (prescription or illegal substances) abuse * Current alcohol use (\>21 alcoholic drinks week) * Allergic to any of the ingredients in the active or placebo formula * Allergic to plants in the Asteraceae family * Pregnant or lactating woman * Regular use of medications that would affect the immune and/or the inflammatory response e.g. antihistamines, anti-inflammatories, immunosuppressants, steroids excluding topical steroid use. * Use of anticoagulant medications such as warfarin. * Participants who are currently participating in any other clinical trial or who have participated in any other clinical trial during the past 1 month * Participants with allergic rhinitis * Regular use of antihistamines * Individuals deemed unsuitable for participation by the Principal Investigator (PI) of this study.