Love Potion #9 (status: researching)
November 28th, 2005,Totally ganked from Warren Ellis.
http://news.bbc.co.uk/1/hi/health/4478040.stm
Some couples may disagree, but romantic love lasts little more than a year, Italian scientists believe.
The University of Pavia found a brain chemical was likely to be responsible for the first flush of love.
Researchers said raised levels of a protein was linked to feelings of euphoria and dependence experienced at the start of a relationship….
Of the 39 people who were still in the same new relationship after a year, the levels of NGF had been reduced to normal levels.