I say this as I am munching on a packet of Walkers crisps and was looking at the back of the packet.
it says 'SODIUM* 0.2g PER 25g PACK' and '*EQUIVALENT AS SALT 0.4g PER 25g PACK'
Salt is 'sodium chloride' so why separate the two on the back of each packet, the mind boggles

well mine does.
Btw, it says that our recommended daily intake of salt is 6g for MEN and 6g for WOMEN and 4g for CHILDREN 5 - 10 YEARS OLD. When I have chips which is quite often I tend to put loads on, big mistake you think? Im only 20 so perhaps its not so bad as someone who is elderly