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High levels of salt have long been linked to a greater risk of developing hypertension, heart attacks and strokes.
They reviewed seven researches that looked at 6,489 people, which they said was a large enough set of data from which to draw conclusions.
Most researches recommended a reduction of 50 per cent of normal salt intake. A person`s daily salt intake from the research papers reviewed was on average 8-9g a day, so the reduction was to around 4g.
But this had no long-term health benefits that may usually be expected from eating less salt, findings revealed.
"Intensive support and encouragement to reduce salt intake did lead to a reduction in salt eaten and a small reduction in blood pressure after more than six months.
"What we wanted to see was whether this dietary change also reduced a person`s risk of dying or suffering from cardiovascular events," lead author Prof Rod Taylor was quoted as saying.
Most experts say too much salt has detrimental health effects and cutting one`s intake may have beneficial effects in people with normal and high blood pressure. But Prof Taylor said he could not find enough evidence for the theory.
He said: "We believe that we didn`t see big benefits in this study because the people in the trials we analysed only reduced their salt intake by a moderate amount, so the effect on blood pressure and heart disease was not large.
"(But) it`s really important that we do some large research trials to get a full understanding of the benefits and risks of reducing salt intake."
The findings have been published in the latest edition of `The Cochrane Library` journal.