To ensure that food proteins do not become scarce in the future despite extreme weather conditions and increasing environmental stress, six Fraunhofer Institutes are focusing on indoor farming systems in the lighthouse project „FutureProteins“ (alternative protein sources). How can wheatgrass, alfalfa, and potatoes be successfully grown indoors without soil, using only artificial lighting? And are these methods not only ecologically sustainable but also economically viable? Fraunhofer IWU is focused on this aspect, as the price tag is crucial for accepting product innovations in the food sector. In regions with significant poverty, high prices could make such products inaccessible.