Are Jewish Women less thin than others?
You are making a rash generalization. When I go picnicking or to amusement parks or even shopping malls I see many women who are obviously not Jewish and terribly overweight. Kosher foods are not, as a rule fattening, especially today. Years ago Jewish people ate more foods with fats, especially chicken and goose fats. Today Jewish women are more health and weight conscious and still keep kosher. Separation of dairy from meat and ritual slaughtering have absolutely no effect on a person’s weight, so you select any diet you wish and still keep kosher.