Provided herein, inter alia, are compositions and methods for culturing mammalian cells. In certain aspects, the composition is a medium containing one or more of a lithium ion source, one or more fatty acids, and/or ethanol. Use of any of the cell culture media described herein to culture cells that have been genetically engineered to produce one or more recombinant polypeptides (for example, antibodies) can result in increased titers, a more favorable glycosylation profile, and/or modulated (e.g. decreased) amounts of high and low molecular weight species, and/or modulated (e.g. decreased) amounts of acidic or basic charge variants, compared to cells cultured in a medium that does not contain one or more of a lithium ion source, one or more fatty acids, and/or ethanol.