The American government recommends that people reduce their salt intake by one third to 6 grams a day. Salt consumption levels per capita have been constant for the last century.
As an indication, the market for salt in the UK in 1986 was £19 million.
At every age there is a link between salt intake and blood pressure. An extra 6 grams of salt per day can produce systolic blood pressures 5 to 7 points higher.
There is no study to show that people who reduce their salt consumption are healthier or live longer.