Adding salt to food is more harmful than years ago because in our developed world, a greater proportion of people are now sensitive to salt than used to be the case. There is both a higher incidence of salt sensitivity and the salt sensitivity itself tends to be more severe. - One of the factors contributing to salt sensitivity is the fact that these days, in general, most children- even toddlers -eat a diet that is too high in salt. Salt is especially bad for children. High salt intake, such as from salty snacks like crisps and salted nuts and junk like Cheesestrings, is a major cause of child obesity. - See Children and Salt. And a taste for salt acquired in childhood is not very easy to 'unacquire'. So the habit of eating over-salted food literally feeds a growing number of related health problems including high blood pressure, obesity, type 2 diabetes, arthritis, stroke, heart disease, depression, dementia and so many more.
But at least as important a causative factor in salt sensitivity as high salt intake in childhood is the ever-growing ingestion of pharmaceutical drugs. Pharmaceutical drugs are being prescribed more and more in the UK (and even more still in United States) and other industrialised countries. Most of the prescriptions are for drugs that cause sodium and water/fluid retention and salt sensitivity. I don't mean that they are prescribed with the intention of causing sodium and water retention, but problems with salt are the most common undesirable side-effects of the most frequently prescribed rugs. These include antidepressants, anticonvulsants, antipsychotics, steroids, birth control medications and many more.
When you couple the over-prescribing of these dangerous salt-sensitising drugs with the highly-salted processed food that is the norm for a majority of consumers these days, it is assuredly a recipe for disaster both on a personal scale and in the wider social context. - I suggest that you try to avoid prescription drugs as far as you safely can and cut down on salt and salty food as much as you reasonably can. You'll lose some excess weight and improve your health and you'll feel sooo much better!