ReGrained proves mainstream market appeal for upcycled foods With a new puffs line in several points of distribution, a line of baking mixes in the works, and plans to convert oat milk byproduct into finished product applications later this year, ReGrained is building a case for the mainstream viability for upcycled foods. Defined by ReGrained is one of the founding member companies), upcycled foods use ingredients that otherwise would not have gone to human consumption which are produced in a way that has a positive impact on the environment (part of the association's certification passed in January 2021 requires the upcycled foods companies must disclose the source of their carbon emissions).