Romantic love lasts only a year
03_Romantic_love_B.mp3 (233782)
Italian scientists have discovered that a chemical in the brain 
(responsible) for romantic love fades in (intensity) over the course of a year. This perhaps explains why that giddy, euphoric, head-over-(heels)-in-love feeling that takes our
(breath) away at the start of a relationship diminishes over time. Researchers from the University of Pavia determined that levels of a protein called Nerve Growth Factor (NGF) greatly increase when a person first falls in love. Raised NGF levels spring from the (rush) of adrenalin, renewed (vigor, vigour) and confidence and lust for life that occur when new love (blossoms) . Levels of NGF greatly decrease over a year or so as security within the relationship sets in. There is then less urgency to constantly (woo) a potential partner to ensure they are yours.
Research leader Dr. Enzo Emanuele reported: “We have demonstrated for the first time that circulating levels of NGF are (elevated) among subjects in love, suggesting an important role for this molecule in the (social) chemistry of human beings.” His research team analyzed the protein balance in the (bloodstream) of 58 volunteers aged between 18 and 31. All of the participants had recently started a new relationship and had that (starry) look in their eyes. The researchers compared the levels of NGF in the starry-eyed group with those in 58 people who were single or in (steady) relationships. The increased prevalence of the molecule in the new romantics caused sweaty (palms) and (butterflies) in stomachs. It may also (induce) young men to buy red roses and candlelit dinners.