The present disclosure provides an oil-in-water (O/W) emulsifier comprising esters of polyglycerol-6 and of fatty acids, and of polyglycerol-X, wherein X is any one of 4, 5 and 7 to 12 and of fatty acids, wherein the fatty acids are liquid fatty acids having a purity of at least 85% w/w, wherein the polyglycerols have a purity of at least 60% w/w, and wherein the emulsifier can form a stable O/W emulsion for at least 1 week at about 50° C. It also provides a method for making the emulsifier and emulsions comprising the emulsifier.