Producing a dairy product on a production line comprising continuously injecting a molten sterol or stanol ester into a milk-based composition containing milk protein but no emulsifier and then homogenizing the mixture,is new. During injection, the temperature (T 2) of the composition is at least equal to the temperature (T 1) of the molten sterol or stanol ester. Independent claims are also included for: (1) product produced as above； (2) apparatus for carrying out the above process, comprising means for maintaining the ester at T 1, e.g. an insulated or thermostatted tank； means for passing the ester to the feed system of the production line while maintaining the ester at T 1, e.g. an insulated pipe； and means for introduing the ester at T 1 into the production line, e.g. a pump.
