We are excited to announce that our review paper "Glycolipid Biosurfactant Production from Waste Cooking Oils by Yeast: Review of Substrates, Producers and Products" has just been published in MDPI journal Fermentation as part of the Special Issue Food Wastes: Feedstock for Value-Added Products 3.0 and is available online here: https://www.mdpi.com/2311-5637/7/3/136 Abstract: Biosurfactants are a microbially synthesized alternative to synthetic surfactants, one of the most important bulk chemicals. Some yeast species are proven to be exceptional biosurfactant producers, while others are emerging producers. A set of factors affects the type, amount, and properties of the biosurfactant produced, as well as the environmental impact and costs of biosurfactant’s production. Exploring waste cooking oil as a substrate for biosurfactants’ production serves as an effective cost‐cutting strategy, yet it has some limitations. This review explores the existing knowledge on utilizing waste cooking oil as a feedstock to produce glycolipid biosurfactants by yeast. The review focuses specifically on the differences created by using raw cooking oil or waste cooking oil as the substrate on the ability of various yeast species to synthesize sophorolipids, rhamnolipids, mannosylerythritol lipids, and other glycolipids and the substrate’s impact on the composition, properties, and limitations in the application of biosurfactants. We are grateful to all authors who contributed to this work: Elina Dace, Janis Liepins, Karina Balina, Raimonda Soloha, Ieva Bērziņa, Līva Kristiāna Lukaša This research was supported by the European Regional Development Fund within the project “Sustainable Microbial Valorisation of Waste Lipids into Biosurfactants” (project No. 184.108.40.206/19/A/047). The contribution of Elina Dace was supported by the European Regional Development Fund within the project “Decision Support Tool for an Integrated Food Waste Valorisation System (DeSTInation)” (project No. 220.127.116.11/VIAA/3/19/528).