Diet is an important modifiable determinant of mental health (1). The connection between food and mental wellbeing is of increasing interest to young people, encompassing both diet quality and relationship with food. There is a need for evidence-based and relatable information at the intersect of diet and mental wellbeing for young people to access online. The objective of this research was to develop nutrition content for Headstrong - a free, evidence-based app developed to support the mental wellbeing of young people in Aotearoa New Zealand. The Nutrition and Mental Wellbeing skill cards were initially developed through a literature review of Nutritional Psychiatry research, the delivery of nutrition information on apps, and expert discussion with dietitians and psychologists. Three skill cards were developed with a grounding in behaviour change theory (2) (COM-B model), and integration of both western and indigenous Māori frameworks related to food and nutrition. Following feedback from a youth advisory group, three final skill-cards were produced: 1) “Letting go of Food Rules” where young people are encouraged to explore the way food nourishes social, emotional, and spiritual wellbeing using an indigenous framework (te whare tapa whā), 2) “Listening to Your Body While You Eat” which equips youth with practical skills related to mindful eating, and 3) “Figure Out Your Food-Mood Link” which explores how food can impact mood through the gut-brain axis. The skills are currently live on the Headstrong app, and are delivered using their native chatbot style of communication which incorporates generative AI. This project presents a novel way for young people to access quality nutrition information to support their mental wellbeing.