It’s known as "navel pulling," and involves massaging castor oil on your belly button and abdominal area. To do what exactly?

The latest one involves putting castor oil in your belly button, also known as naval pulling. The fad is making its rounds on ...

Starting in 2005, Steinhauser – then a chemist at the Vienna University of Technology – collected pieces of belly-button fluff from his navel and recorded their colour and weight. Over the ...