In 2023, Criterion Institute and UNICEF partnered to develop child lens investing: an emerging field that intentionally integrates considerations of child rights and wellbeing into investment processes. Understanding is growing of the opportunity that exists for increasing economic, social, and environmental impact by considering children when making investments. To help advance the field, the Global Alliance for Improved Nutrition (GAIN) and Criterion Institute have partnered to highlight the critical opportunities that can be unlocked by child-lens investors embedding a strong nutrition focus within their work. This report highlights why improving nutrition may be the best investment we can make in children. It provides an overview of the types of investment opportunities that can be made by using an integrated nutrition and child lens to inform investment priorities, outcomes, and decisions.