Is Fat But Fit A Big Fat Myth?

For example, epidemiological studies found that women taking combined HRT (hormone replacement therapy) also had lower incidence of CHD (coronary heart disease). The leading doctors concluded that HRT is protective against CHD. However, randomized controlled trials showed that HRT actually caused a mild but statistically significant increase in risk of CHD! The reason that HRT was correlated with lower CHD, was that the women more likely to take HRT were also from higher socio-economic groups, with better access to health-promoting foods, exercise, and lower overall stress, and that was why they had a lower incidence of CHD.