The invention concerns an O/W emulsifier, an O/W emulsion prepared therefrom and the uses thereof. According to the invention the O/W emulsifier contains (a) 70 to 90 wt. % of glyceryl oleate citrate and (b) 10 to 30 wt. % of a viscosity modifier having a viscosity in the range from 1 to 10,000 mPas.