The predisposition to food allergy development and the induction of allergen-specific immune responses appears to be initiated early in infancy. Early exposure to food allergens, such as peanut and cashew nut, via human milk is likely important in initiating oral tolerance and reducing risk of food allergy development. This trial aims to determine if the risk of developing peanut and cashew nut allergy during infancy can be reduced by a high peanut and cashew nut maternal diet during lactation.

This is a multisite, parallel, two-arm (1:1 allocation), single-blinded (outcome assessors, statistical analyst and investigators), randomised controlled trial. Target sample size is 4412 participants (2206 per group). Women (aged 18–50 years) with a singleton pregnancy, who are planning to breastfeed and do not have peanut and/or cashew nut allergies are eligible to participate. After obtaining written informed consent, participants are randomised to either a high peanut and cashew nut diet (at least 60 peanuts and 40 cashew nuts per week) or a low peanut and cashew nut diet (no more than 20 peanuts and 12 cashew nuts per week). Participants are asked to follow their allocated diet from birth to 6 months postnatal. Individual lactation consultant advice and support is provided as required. The study’s primary outcome is food challenge proven IgE-mediated peanut and/or cashew nut allergy during infancy (0–18 months). Key secondary outcomes include infant sensitisation to peanut and/or cashew nut. Analyses will be performed on an intention-to-treat basis according to a prespecified statistical analysis plan.

Ethical approval has been granted from the Western Australian Child and Adolescent Health Service Human Research Ethics Committee (approval number RGS0000006685). Trial results will be presented at scientific conferences and published in peer-reviewed journals.

Australian New Zealand Clinical Trials Registry (ACTRN ACTRN12624000134527)

To address the lack of accurate and accessible mental health medicines-information resources for children, young people and their parents/guardians using design thinking to co-design free-to-use, video resources tailored to this audience.

A multiphase qualitative case study using the Double Diamond model of Design Thinking: Discover, Define, Develop and Deliver. This included iterative prototyping, thematic analysis and public and patient involvement throughout.

Dublin, Ireland with online distribution of the final resources internationally through a free, open-access platform.

A multidisciplinary co-design team including two specialist mental health pharmacists, two academic pharmacists, five consultant psychiatrists, a psychiatric nurse, a youth content specialist, three youth activists and a parent representative.

26 co-designed, medicines-information videos were created, including versions for children (voiced by children), parents/guardians and young people. Videos feature storytelling formats with Bitmoji characters. Feedback from youth and parent collaborators guided design and content. Since launch, www.youthmed.info has had over 25 000 website views and more than 30 000 video views, with engagement from over 91 countries. The resources are also linked on national and international clinical and charity platforms.

Youth Med.Info addresses a gap in accessible, accurate mental health medicines-information by placing users – children, young people, parents/guardians and clinicians—at the centre of its design.