Professor Hank Greely weighs in on the business model of genetic informtion firm 23andMe in this BBC News article by Michelle Roberts and Paul Rincon. 

A personal DNA test that has sparked controversy in the US has launched in the UK.

The UK's Medicines and Healthcare Products Regulatory Agency (MHRA) says the 23andMe spit test, which is designed to give details about a person's health risks based on their DNA, can be used with caution.

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"I think a large part of it is trying to expand their markets," said Professor Hank Greely, director of the Center for Law and the Biosciences at Stanford University in California.

"They may also want to make it clear to the public, to their investors, to their employees that they're alive and kicking."