The AQUABIOPRO-FIT main objective is to promote efficient utilisation of European aquaculture, fisheries and agriculture side streams in feeds and nutritional supplement products promoting fitness and health. To this end, we will develop side stream biomass processing technologies to up-concentrate nutrients and bioactives maintaining product quality and minimising waste. The safety, bioactivity and acceptance of the developed ingredients and products will be documented through cell, animal, taste panel and intervention studies with humans, namely athletes and patient groups. Technical, marketing, economic and environmental studies will complement the documentation portfolio of the AQUABIOPRO-FIT concepts and products. The developed knowledge and principles will be further systematised in net-based training modules, which will follow the intellectual property rights of the developed methods and products. Information material will be created for educating the public and raise awareness of the importance of circular economy and promote acceptance for side stream bio-based products in end markets.