The conclusions of the study could revolutionise the entire world of glamour.
Stephen Eichhorn and Roland Ennos said that firstly humidity was the key factor in growing the healthiest of nails.
Less humidity could make the nails brittle and easy to break, while too much of it could make the nails susceptible to a catastrophic degree of twisting and possible shearing.
However, the optimum level is 55 per cent humidity, a level that translates to normal atmospheric conditions in Britain.
"The mechanical properties of fingernails are important because of their impact in preventing damage and in maintaining their appearance," the Telegraph quoted Ennos as saying.
He added: "In particular, knowing the effect of local environmental conditions can tell us how they might best be protected."
It is known that nails are more flexible and, therefore, easier to trim after a hot bath.
However, they undergo a "dramatic" change when the humidity around them rises to 55 per cent.
And scientists have said that at this point, they are most resistant to damage from splitting.
"We have found that fingernails cope remarkably well over a range of humidities. But it is best not to get them completely dry or completely wet. At an average of 55 per cent humidity, which is what you would experience normally, it appears that nails have optimum mechanical properties and resist bending," said Eichhorn.