Abstract
In the present issue of the Journal, Bennion et al. show that the bile of women taking birth control pills is considerably more saturated with cholesterol than that of other women. The mean level of cholesterol saturation was 92 per cent in women off the pill and 125 per cent in women on the pill. Twenty out of 22 women showed the effect. It has been established that the higher the cholesterol saturation among patients without gallstones, the greater the prevalence of gallstones in the population from which the patients were chosen.1 For instance, the Masai of East Africa . . .