The nutritional supplements industry is booming. But what most people don’t realize is that unless you are seriously malnourished, supplements don’t help at all. Actually, if they are contaminated they can cause serious harm. One of the greatest marketers of supplements is ‘Dr.’ Oz. 

Since the doctor was recently subpoenaed to congress, John Oliver was inspired to cover him and the nutritional supplements industry on his Last Week Tonight comedy-news program.