Generations are often defined by shared challenges. In health, Baby Boomers had to confront smoking and, similarly, Millennials will have to confront obesity.
In the chart below, I’ve plotted smoking and obesity rates in the US over the last 50 years (data from CDC and NHANES). Smoking and obesity, both primary risk factors for chronic disease in the US, have virtually switched places. While smoking rates have been cut in half, obesity rates have more than doubled over the last 50 years.