Six years ago I was part of a consulting team that was asked by a major biotech firm to conduct a six-month long double-blind study of its sales force.
Then, this week, the King Institute of Preventive Medicine, a flagship government hospital in the Tamil Nadu capital of Chennai, announced its intention to do a double-blind study to see how effective the neem-papaya mix is in battling dengue.
And in a study published last year, researchers in Australia showed in a double-blind, placebo-controlled trial that subjects with suspected gluten sensitivity had substantially fewer symptoms on a gluten-free diet than control subjects who unknowingly ingested gluten.