I was put on a low sodium diet 18 months ago due to a Pulmonary Edema attack. Thought I was going to die. They said 2000 mg/day. I keep mine almost daily at or under 1500.
Prior to Edema attack my BP was routinely 140/100 sometimes less for decades. Now I check weight n BP daily, I’m slowing losing weight and BP is never over 120/80 usually 100+/60+.
The best indicator of my sodium level are my ankles, water retention ie puffy ankles.
Should have changed 20+ years ago, BUT ... didn’t heed Dr warnings.
Near death is a great motivator
Forgot to mention, virtually anything in a box or can is high sodium.