Salt.
After a close relative ended up in the Cardiac ICU for a couple of days with congestive heart failure - nearly dying before my eyes at one point - I went grocery shopping. I was gone for 2 HOURS looking for things the person could eat.
Salt is in almost EVERYTHING. There is salt in Jello. Of course, it’s a preservative, but between the (something)-ose, actual sugar, and salt, you have to look and maybe end up eating 5 things for the rest of your life. For salt, for example, we’re talking a pinch of salt per day/400 mg.
I eat little salt now, but even the salt substitutes are bad for you, or so I’m told.
Side journey.., in Afghanistan I got a horrible case of Big-D. The Afghans from Nuristan gave me watermelon with salt and then liver kabob. I found out later this replenished electrolytes perfectly. Only time I had liver kabob in 5 years there.
Eat himalayan salt...not Mortons
I’m not a salter - even homemade soups. I leave that to the eventual eater to decide what they want.
I do love the salt-free herb blends available - ‘Sunny Paris’ from The Spice House in Milwaukee, WI is exceptional and I use it on/in just about everything. :)