Genes are the latest trend in nutrition, at least going by the burgeoning  legion   of Internet companies offering diets tailored to our genetic make-up.  These services are relatively affordable and simple to use.

Pork factories now rely on a new kit to examine suspect meat . The technique was developed in an EU funded project called Biotracer . It relies on maths algorithms to pinpoint the most likely origin of harmful bacteria on meat , such as salmonella.