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ROME (Reuters) - Your heartbeat accelerates, you have butterflies in the stomach, you feel euphoric and a bit silly. It's all part of falling passionately in love -- and scientists now tell us the feeling won't last more than a year.

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The powerful emotions that bowl over new lovers are triggered by a molecule known as nerve growth factor (NGF), according to Pavia University researchers.

The Italian scientists found far higher levels of NGF in the blood of 58 people who had recently fallen madly in love than in that of a group of singles and people in long-term relationships.

But after a year with the same lover, the quantity of the 'love molecule' in their blood had fallen to the same level as that of the other groups.

The Italian researchers, publishing their study in the journal Psychoneuroendocrinology, said it was not clear how falling in love triggers higher levels of NGF, but the molecule clearly has an important role in the "social chemistry" between people at the start of a relationship.

I dont believe that. I know people who are more passionate now,then they were in the beginning, and they have been together for 4 years. Oh please, i believe in science, but you cant explain the feeling of beeing in love with NGF.

lol I dont believe it either, I just thought it was an interesting opinion.

Oh yeah, ofcourse it is. If it wasnt interesting, i wouldnt have read it. lol Sorry if you thought I didnt care about it. I just had a different view on it from what the article said.

kk

lol I wasn't offended.

But after a year or so, wouldnt you feel more comfortable with whoever your with?

I would hope so

So...of course the nerve growth will die down What a stupid waste of time for those researchers.

I just looked at your sig. omfg lmao