The length of a person's fingers could reveal whether someone is more likely to order 'masculine' food like burgers or 'feminine' food like salads, a new study claims. 

Researchers looked at people's 2D:4D digit ratios - the difference in length between the index and ring finger - and how this related to their food choices.  

A lower 2D:4D digit ratio (having a longer ring finger than index finger) is said to indicate higher exposure to testosterone in the womb - and is therefore suggestive of masculinity.  

In experiments, hungry people with low digit ratios made more masculine food choices - regardless of whether they were actually men or women.   

Some have criticised the 2D:4D digit ratio for a lack of reliability - but this study does suggest it's linked with food choices typically perceived as masculine or feminine.  

A higher 2D:4D digit ratio (left) is said to indicate lower exposure to testosterone in the womb - and is therefore suggestive of femininity. A lower 2D:4D digit ratio (right) is said to indicate higher exposure to testosterone in the womb - and is therefore suggestive of masculinity. Researchers say it can successfully predict our food choices - but only when we're hungry 

When people were hungry, masculine digit ratios led to masculine food choices, the study found.  

However, this effect only works when people were hungry - 2D:4D digit ratios did not effectively predict satiated people's food choices.