Disclosed herein are pharmaceutical compositions and methods for oral sublingual or subcutaneous administration comprising a sterically stabilized liposome carrier comprising: i) poly (ethylene glycol) distearoylphosphatidylethanolamine (PEG DSPE) and ii) at least one of phosphatidylglycerol and phosphatidylcholine. Compositions and methods for treatment of food allergy and eosinophilic esophagitis are also described.